Issei was always a little different than his other counterparts in the multiverse. Most of his counterparts were different in general. But it was the morning after his heroic saving of Rias after the wedding. And you best bet that the two of them did the deed all night and they enjoyed every second of it. This was it was the morning and Rias already slipped out of the bed to go to the bathroom. Issei however felt a bit odd as he rolled out of the bed. Looking around he saw that he wasn't normal. His hands were thinner and his skin was moisturized to an extreme extent but the glaring thing was there were two round balls of flesh connected to his chest.

That alone got him freaking out as he looked down between his legs and saw his penis but when his finger reached down further he felt what he felt last night only on a woman. "Rias" Issei called out for the redhead.

A few moments of silence passed as she came in dressed in modest pajamas so she could walk about the house. She didn't look too surprised to see the now female Issei sporting a slight boner and hands between the legs. "Yes?" She asked him.

"Something happened, I need to borrow your panties." Issei said but didn't notice that his voice was ever so slightly different.

She was puzzled at what she had just heard. "And here I thought you were more into breasts."

"I am! But this is different."

She nodded "I can see that much." She pointed at the little black tail next to him that was a thing with a spade on the end. "And by the looks of that, I already know what happened, but there are still many questions."

"Like why am I a woman?"

"Well, I know why you are, but also why you shouldn't be."

"And why is that?"

She walked over next to the feminine one and sat down "Well you're a succubus. The problem is you are a man. A man should be an incubus but you have the body of a woman. So that raises more questions." She reached over and touched the erect penis "But it seems as if you're enjoying this?"

Issei grabbed his nipples and rolled them in his fingers "Kinda? Don't get me wrong these are great." He let go of one with his left hand and grabbed Rias' left breast as he snuggled up to her. "But I like yours more." The new soft face crashed into Rias and pushed her onto the bed. Issei was hungry for more pussy.

For Rias, it was apparent what Issei wanted but she knew time was a larger factor. "Not right now" She said as she pushed him away and got off the bed and kneeled in front of it and grabbed ahold of his cock. A quick stroke and she started jacking him off as he began to moan like a girl. "We need time to figure this out, so make it quick." She told him as her mouth was quick to begin bobbing up and down on the cock. To make it even more interesting for the man who had jacked off over a thousand times she rolled her index finger over the virgin pussy as it was working. She could feel the cock pulsating and it was working better than thing others or even her own could work it faster, but she had to speed it up so a finger went in, not far but just enough to do anything but just enough to catch the insides and she rolled it around. It was sensitive beyond belief and when she ran her finger down to the bottom she felt a rush of hot cum in her mouth.

"Oh Rias, that was…" Issei was breathing hard after that.

Rias pulled away "Well that was fast" She smiled as she watched the erection go down.

"After last night I'm surprised I could even do it anymore."

She giggled at that "I had fun last night as well." She held her hand up as a red magic circle appeared and clothes fell out of the circle onto the bed. "I took the liberty of getting some correct-sized underwear for you already you get to pick the color." The two of them got up and all he could see were lace thongs with matching bras in white black red and pink.

He shrugged his shoulders at that "What color do you have on?"

"What color do you want me in?"

He raised an eyebrow at that "Wanna play opposites? Maybe all light or all dark."

"Ohhhhh let's do opposites." Rias said as she arranged the white and black sets and the red and pink together. "So what do you want me to wear?"

"Take the black."

"Going with the traditional white then." She swooped up the other three pairs and sent them away and quickly flung off her clothes and went to the dresser and started getting dressed. "I'll help you with the bra in a moment."

"I think I can handle a bra." He said as he started with the panties.

Rias only giggled at that. "If you say so."

When the panties were pulled up something weird happened there was a very flush fit in his crotch as his balls didn't spill out of them almost hiding them perfectly. The only downside was there was a slight bulge where his cock was and as they were thongs it rode up the ass crack. It was a weird feeling that Issei was never expecting to wear a pair of panties letting a thong and one that a girl picked out for him. But you can't say this was a normal Saturday morning anymore. The bra was the next task on the list as he knew the basics, arms through straps, flesh in cups, hooks in the back. Turns out Rias was right as when he tried putting the hooks together his arms were flailing around like an idiot trying to get things working. He heard her trying to hold back her laughter "Hey!"

"I told you. It's not as easy as you think." She grabbed his hands and the straps doing it for him. Once it was fastened she reached forward and cupped a hand full of titty making sure the bra was in the right spot so it fits correctly. "You can take them off easily but putting it on not so much." Once everything fits correctly she pulled on the strap snapping it as the tension was hoisting those tits. Next was that long hair that accumulated as she snapped it into a simple ponytail and put a red crimson hairband to hold it together.

"What now?" He asked her "I'm not exactly going to go outside like this."

She pushed her hand onto his back and a crimson glow flashed as he was fully dressed in the girl's school uniform down to the long white socks and shoes. "All done"

He looked at himself in the mirror that Rias had added to the room since her arrival and twisted all around. "I look great."

"Don't get too excited."

He smiled at that "Don't get me started on the thought of it. Girl on Girl action, these panties might not survive the thought."

Rias reached down and grabbed the thin tail and wind it up shoving it in her panties. "Let's see how this goes." She grabbed his hand and dragged him out of the room "Come on let's go"

When she dragged him out of the room the two of them were greeted by Asia as she smiled "You look different"

Issei felt a weird feeling in his body didn't know if it was in his chest or the groin. He wanted to hug her. "Let's go to the club room." Rias look at Aisa "We need to fix him." She dragged the two of them outside

They walked to the school and had a peaceful time as few people were looking at them. Fortunately, they made it to the club room with ease as Akeno was already waiting for them. "Well now, this is a surprise." Akeno said seeing Issei.

"You have no idea how weird it was waking it up next to him looking like that." Rias said as she walked over to her desk and sat down at her desk.

Everyone else took a seat on the couches. "So that outfit." Akeno asked pointing at Issei.

Issei didn't know what to say so he grabbed the bottom of the skirt and showed off the panties. "This help?"

"Oh, my" Akeno said seeing everything. She looked over to Rias "This is much different than you told me."

Rias shook her head. "Yes, I have some thoughts on all of this. It's clear you are a succubus and that's not something that should be possible." They watched as he reached back and pulled the tail out of the panties. "Do you know if anybody in your family would know about this?"

He shrugged "No I thought we were all normal." He waved his hand around as the tail mimicked it while Rias and Akeno saw that "But then you told me there are Devils and a dragon inside of me."

"Right, I had Akeno order a book. We have to wait for it to show up to see if we can even change you back. There are a few possibilities for how this happened. First, it's in your bloodline somehow, Second is Atavism and the third is a Succubus gave you some of her power, and it's now just showing up."

"My bet is on the third one." Akeno said with a smile "It would explain why he's such a pervert that and the love for breasts."

"I do love me some boobies." Issei could not deny that.

"Or maybe you and Rias had so much fun you turned into a succubus yourself."

Asia wasn't too happy hearing that as she wanted to be with Issei and he could tell that much. So he wrapped his arm around the girl and pushed her head into the side of his chest. "Don't worry Asia, if all goes well your next."

It was no secret that Asia was head over heels for Issei and this plot development was going to put a damper on things. Well, a damper in Asia's mind Issei still had his junk so that wasn't stopping much. They heard the door to the club room open up as they looked over and saw Koneko and Yumi a thin blonde swordswoman. "So this is why did we have to go to the underworld so early in the morning?" Koneko asked as Yumi was holding on to a large book that was bound in dark black leather and chains.

"Issei is that you?" Yumi asked seeing the brown-haired woman.

"Yo" He waved his hand.

"Prove it" Yumi was surprised to see this change. Soon a red gauntlet appeared on the female hand ending all doubt.

"Great now the perversion has bled into our gender." Koneko was unenthused with what she saw.

The two of them took the large book and placed it on RIas' desk. "So how did this happen?" Yumi asked looking for an answer.

"If I tell you can I look up your skirt?" Issei asked Yumi as she quickly looked to Rias for the answer.

The book flopped open as she started looking at the index. "I don't know, but we're about to find out." She started flipping through pages looking for spells that could solve this for her.

Yumi and Koneko sat down "so how are you liking it?" Yumi asked still puzzled at it.

"It's interesting?" He shrugged. "I have the urge to make out with someone tho."

"That's because you're a pervert." Koneko said as she tried to rag on him.

"I can't argue with you on that one."

"Enough about that," Rias said as she got up from her desk holding a magic circle "Let's see how this goes." She stuck her hand towards Issei as he was engulfed in a red light.

When it disappeared his face was red and they could see that the shirt was not doing a good job of holding the nipples back "What the hell are you trying to make me horny?"

"No?" Rias was confused at that as she looked at the results. "But it seems Akeno was correct."

Akeno only smiled hearing that "yes"

"Turns out a succubus made you their child a long time ago with some odd side effects." She said as she walked back to her desk and grabbed the book. "Stand over there." She pointed to an open spot next to her desk. Once he was there "Catch" She tossed the book at him. The second he grabbed it he was engulfed in a pink light.

When the light disappeared Issei was on his knees "What the hell was that all about." He pushed the book away.

Rias picked the book up and put it back on her desk. "Turn yourself back."

"Uh Rias," Akeno called out "Did you forget he is bad at magic?"

She shook her head."No, I remember. Demonic magic and Succubus powers are similar but the book taught him everything he needed to know."

"Right it taught me something?" Issei was still confused "If teaching how to make these panties wet and nipples solid steel it's teaching me real well."

"Just think of what you want to look like and use some magic to change." Rias said looking down at him.

"That simple?" He only got a nod from Rias. "Right. Okay then." In his mind the was thinking of his male form how he always had been. A quick flash of pink and his body changed, hair back to the short brown hair and the male clothes. He made a quick look and down into his pants to see if the underwear was changed. "Wow, it did work." He reached down and squashed his junk just to make sure everything was working.

"See Akeno, It seems he can learn magic."

"This magic is cool tho." Issei got up with a smile on his face. "Also how do I know what I can do?"

"Look at the book." Rias said as he went looking through the book without a care for the discussion outside.

"Shouldn't we limit him, you know because of what could be in there?" Akeno brought up a good point those books were filled with knowledge but also what they contained could be fun at the same time.

They heard the book slam shut as Issei turned around with a smile on his face. "What did you just read?" Rias had to know what had him so excited.

He snapped his fingers as his clothes changed to a loose pair of shorts and a t-shirt. "I can change clothes."

"Oh?" There were much worse things that it could have been so Rias was somewhat relieved.

"Also" He snapped his fingers again "I can do it from a distance."

"What is this?" Koneko asked as her clothes were changed she had a hat on her head along with she had a slightly bigger baseball top that went past her waist long blue socks that went up most of her legs and there was a blue skirt with a white edge.

"It worked tho."

Rias smacked him over the head "Change her back."

Issei sighed hearing that "Fine" He snapped his fingers once again as Koneko was changed back into her school uniform.

"Oh and Issei." Rias said as he looked at her. "Do change back again."

He looked at her and smiled "Okay then but don't complain later tonight or soon."

Akeno snickered hearing that as they watched as the man changed back into the cute girl. "What are you having sex with her like that?"

He thought of it as he sat down next to Asia. "Sounds like fun did you want to join in? You might have to wait a little bit, however."

Everyone knew what he was referring to the wait. "Sounds like fun." She coughed a glimpse of the blush on Rias' face. "Are you enjoying your time like this?"

"Are you kidding me? Panties are awesome." That got some looks out of them. "Men's underwear is okay. I mean it's serviceable but these are so soft and so nice."

"Yumi, Koneko." Rias called out to the two girls stopping his rant. "Thank you for going to get that so early in the morning. If you would like you two can leave and do whatever else you need today."

Koneko was quick to get up and leave as Yumi followed her at a more leisurely pace. Seeing that she was gone Issei learned over to Asia "Say Asia." He spoke into her ear "Do you want to do anything?" A hand touched her leg as it slip up her skirt he could feel part of her panties

"I uh" she looked down in embarrassment as her hands tried to stop his girly fingers.

"Oh, my how bold of you." Akeno said seeing the sight in front of her.

Issei could wait as he pulled his hand out "You want to take her place?" Issei asked looking toward Akeno. He patted his lap trying to get her amazing body in his grasp with a smile.

"Akeno" Rias called out to her Queen. "Just know what you're getting yourself into." Rias knew that she was thinking about tempting Issei." He held her hands outputting up her index fingers a fair distance apart.

"You serious?" Akeno asked seeing the distance "That explains a few things."

Issei was going to speed this process up as he was going to expedite her decision. So he got up from his see and walked over to her. Akeno didn't notice it immediately as she was focused internally. But it was when the two of them were face to face did she figure it out. Issei had a slender hand reaching back behind Akeno as he grabbed onto her plump ass as felt a handful of silk panties as well. "Not only do you have bigger breasts than Rias but a plumper ass but she's is much firmer."

Akeno was not going to take such a thing as she reached behind and grabbed Issei's ass and squeezed it. "Nice firm behind, unfortunately…" She let go and grabbed his hair and pulled on it bringing his head backward "I'm the one in charge." Akeno told him as her other hand tugged on the skirt pulling it off.

"How bold of you." Issei said a he could feel his exposed ass.

"Let's see then." Akeno raised her hand up and opened her Issei's shit as she reached down into it "I think I can play with you for a bit." Her hand pushed the top of the bra aside as a finger got on the nipple.

Issei moaned as an ice-cold sensation came across the nipples making them rock hard. "Oh mistress please, my panties are so wet because of you."

"Mistress?" Akeno asked with a smile as Rias sat down next to Asia. "I think I like the sound of that." Issei smiled as it flashed pink engulfing the two of them. Their clothes were gone leaving only the panties on Issei were left. Akeno however was not so lucky as she was stripped bare wondering how he was able to progress in magic so quickly. "Oh?"

Issei pulled her head towards his lips collided tongues clashed. "Something is telling me I have to do this and I don't know why." He said as the two of them made out.

"It's what you are." Rias said watching the two of them go at it. "We knew this was going to happen when I saw you this morning. And if it were anyone else Akeno might have beaten you to a pulp already."

Akeno was quickly overpowered as normally she was much stronger than he was. He ran a hand down her belly and down to her crotch. He felt something was missing "You don't have any pubes?"

"Devils don't need them." Rias said watching them. "Issei how about this. I want you to make her cum, BUT you may not penetrate her, tongue and fingers only."

Akeno watched Issei's eyes light up hearing that "So I can have fun with one of the most beautiful ladies in the school." He sat her down on the couch "Maybe we can make out with each other sometime later. He got down on his knees in front of her stuck his head between her legs and got to work.

She held onto his head trying to hold him back but the tongue was already there as he was doing his thing. "What have you done Rias." Akeno asked with his head between her legs.

"It was bound to happen with the way you were. You did nothing but tease him during training. Did you not think he was not going to be attracted to you?"

Her eye twitched as she was leaning over trying to get him out but that didn't work. "Rias that isn't…"

"Fair?" She asked to know what Akeno wanted to mess with people. "Issei did the same thing to me last night. Speaking of last night, I need to get rid of that wedding dress."

Issei's head popped out as he looked back at Rias giving Akeno some relief for a moment. "No wait keep it that and the bra and panties. I know it's a bad memory but I have an idea for them."

She only shook her head as Akeno moaned from the fingers that surprise penetrated her. "You are a pervert deep down aren't you?" He didn't bother answering that question as he was focused on the prize. They watched as Akeno was squirming and breathing deeply and Issei was thrusting his fingers into her. "Issei please"

"Please what?" He asked as his thumb was laid on her clit and looked at her.

"Finish it." He saw her red face on her as she could see a smile on his face.

Rias and Asia watched as Issei finished her off as a pink outline was around Issei as his tail wiggled around like it was happy. Akeno was weak from her newfound experience as Issei took a seat next to her holding her up. "I feel great" He said looking at the other two.

"Before you get any ideas, Asia will be for later." Rias was quick to interrupt him. "But right now you feed off women. You gain strength off it but don't think that this will be an easy skip to forgo training."

"I feel like a million bucks, I've never felt like this before." He rubbed his fingers across his right breast as his other hand ran and touched Akeno as well. Looking down he saw that while horny there was a lack of stiffness. "I feel incredibly strange now."

"Don't feel too bad about it. You can freely jump between the two so you're bound to have some neat experiences."

"Ummm" Asia spoke up "Can we even call Issei Issei anymore if he doesn't look like Issei?"

Rias thought about that for a moment."You know it didn't bother me but I can see that being a problem, so let's think of a name that starts with I just to keep it the same."

"Iris? I've heard that one before and thought it was nice."

"Irisa, Ishie, Isane or maybe Isami."

"Ohhh I like Isami." Asia was happy to hear that and sealed her fate.

"So Isami is your name while you look like that." Rias was happy to announce that.

"Sounds fun," She said as now she had a name. "It's still weird being like this, fun tho. My penis is gone but I think that's because of magic?"

"Correct." Rias nodded hearing that "You changed your body into that of a woman so you stored everything away."

"So does it all work? You know like." She pointed down at her vagina.

"It should, why?" She asked.

"I need to order some stuff." Isami said thinking about what she should buy.

Rias shook her head knowing what she was going to order. "Ordering some toys?" Akeno asked as she wrapped her arms around Isami. She spoke into her ear "Find something you like, I have a way to use it on you."

Rias and Asia saw a slight blush on Isami's face hearing that. She leaned over to Akeno and planted a kiss on her cheek. "Only if I get to have you first." She got one last squeeze on Akeno's breast while she could.

Akeno was somewhat surprised at how she could be so bold. "You're enjoying this aren't you?"

"Of course, I'm enjoying you. I think I would be a shitty person if I didn't enjoy the activities. We should schedule something like this again."

"That's not what I…" Akeno sighed hearing that "I'll think about it. Also, where's my clothes?"

Isami held up her hand as Akeno's clothes began falling out onto her lap. "It's cool I can do these things." The bra was the last thing to fall out as she looked at it. "This thing is massive I guess they weren't kidding about how big you are."

Akeno was quick to get redressed as she looked at her. "Get dressed."

Isami sighed hearing that "fine" Her clothes appeared and started wrapping her body as she moved over to the other girls. "Rias" She called out as she sat on her lap and put her arm around her. "Akeno is being mean to me."

They saw that Rias had a small blush on her face "What do you want me to do about it?"

Isami smiled seeing the blush "What I want is…" She pointed at Rias pushing her finger into her chest. "You."

Akeno started laughing at that as she watched as Rias was breaking down "You should see the look on your face Rias. Your face is as red as your hair."

A finger was snapped as Isami changed back to Issei as his clothes changed from the girl's uniform to the boy's. "After that appetizer with Akeno, I'm ready for a second helping. But I think I want something blonde before I got back to my red."

He slid off Rias' lap and next to Asia as his arms wrapped around her and his right hand on her skirt. "Well, Asia?" He asked her as he held onto her as his fingers crept to the edge of her skirt he was using his fingers to pull it back slowly to reveal her bare legs.

"Issei" She called out to him as he pushed her head to look at him. He quickly pressed his lips to hers as she clammed up. Everyone knew that Asia wanted to be with Issei and it was no secret to anyone even half the school understood that Asia was in love with him.

Her shirt and skit were quick to disappear showing off her extremely simple white bra and panties. His hand slid up her thighs and he got fingers on her panties as he pressed on them. She squirmed but was fully focused on the fact that they were kissing so he could do almost anything he wanted. He did what he wanted as he was able to flick her panties aside and slid his fingers onto her the edge of her vagina. With her big sisters watching there had to be some care involved and Issei knew that as his fingers slid around her as he dominated her mouth as well. Wrapping her arms around him she left herself open to one last thing as he slid a finger inside and rubbed it around, she snapped her legs closed but his hands were already there so it was far too late for her. The upside was whether or not she knew it she was enjoying it and she was almost at the point of fully surrendering herself to him. The two of them broke away for air as she moaned "Nooo" She wanted more of what was happening.

Was Issei ever going to be this bold was one of the few things running through Rias' mind at the time. Akeno was no different as she saw that a switch was flipped in the last few days. "Asia my hand is wet."

"Oh sorry." She was embarrassed to even hear that.

"No that's a good thing." He said as he pulled his hand out and moved her to his lap. As the two of them faced each other as he got to work undoing her bra. "Do you understand what's going to happen next?" He asked her as he set the bra aside from her perky nipples, leaning forward he put his mouth on her nipple as his tongue licked away and his hands slid into her panties from behind.

Akeno was intently watching the two of them as the door opened and entered two other girls "What are you doing." She shouted at them seeing Issei and Asia.

The two of them stopped everything and saw that it was Sona and Tsubaki of all things. Asia was getting ready to pass out from the shock. He quickly snapped his fingers and Asia was fully clothed but the damage was done already. She was out cold as he moved her off his lap and sat her down.

"I tried to warn you." Akeno taunted him knowing full well what was coming.

"You didn't say shit." Issei knew he was right nothing was said at all.

"I told you to get dressed, not undress Asia."

Sona shook her head at that. "Rias explain."

"After last night's event Issei and I…" Rias wanted to downplay it as Sona wasn't the most open person she knew.

"You two had sexual intercourse, everyone expected as much after what happened last night."

"Right and when I woke up this morning I found that Issei is a succubus."

"Incubus you mean. He's a man"

Rias shook her head "No you heard me right." She looked over at Issei "Show them."

He snapped his fingers once again as he completely changed over his clothes and all. They were astounded to see such a thing happen. Unfortunately, that didn't last long as Isami fell over asleep. "I was wondering how long it was going to be before that happened." Akeno said seeing the girl conked out.

Sona looked over the two of them. "Magic Deffency? But I thought you said he had little to no magic."

"Yes, it looks to be as such." Rias said as she gestured to the book on her desk. "I requisitioned a book for a succubus to figure out how to change between genders."

"When you say genders.." Tsubaki said to her

"Born a man and granted powers of the female lust demons. Don't ask me how but it makes no sense to me as well. And before you ask his family is clean I didn't see anything. It seems as if a succubus granted him powers at a young age and they festered till last night…" Her face turned a little red thinking back to the wild night they had.

"Great." Sona shook her head "So not only is he the Red Dragon Emperor but also a female lust demon. Your peerage is getting stranger and stranger."

"Yes it is, going to bed with a man and waking up with a woman there was quite a shock to me."

"You know this is going to cause problems right?" Sona asked her.

"Oh, we know." Rias was not surprised to hear that from Sona as she rubbed her head. "And because of the Succubus powers, we can only hold it back so much. There's going to be a point where he or she might come for your girls or even you." Sona was far from happy to hear that as she pushed her glasses back up."Don't kid yourself on that one. I've heard the stories of what could happen. Koneko is far from interested in him and Yumi is well who knows with that girl."

Tsubaki was looking at Asia. "What of her?" She asked Rias.

"Asia?" Rias asked for reassurance "She's so into Issei that they might as well be stitched together. Don't worry about her."

"We can try to keep it in check, but anything after that I don't know what we can do."

Hearing that from Akeno Sona was thinking of what was to come "Have you told your brother about all of this?"

Rias shook her head "No, the family knows about it, So I think he should have been informed."

"Right, I'll speak to my sister to see if there is anything we can learn about this." Sona looked at Tsubaki "Anything you can think of?"

"How much of a woman does he become?" She asked.

Akeno walked over to the sleeping Isami and opened up her shirt showing off her massive tits and then rolled up her skirt showing that her panties were lacking a bulge. "It's a 100 percent swap."

"Make him act like a girl when he chooses to change sides." Tsubaki said to them.

"Thought about that one already." Rias said to her "Problem is Issei is a bigger pervert than you think he is. Breasts and bras are one thing but while he doesn't admit it he likes panties as well."

Tsubaki shook her head at that "He's a bigger pervert than we expected. He even enjoys our underwear more than we do." She had shivers just thinking of that thought.

Rias looked over at Tsubaki "Do you not enjoy your underwear? I like mine."

Sona was rubbing her forehead at that "Rias not everyone is like the two of you. The things you two wear I'm not even sure can be called underwear."

"Issei seems to like it." Akeno said getting a sigh from Sona.

"Maybe we should take him and go buy some new stuff." Rias said having an idea.

"Were doomed." Sona might have been too late to save the women of the world she was going to try.

"Oh come on Sona, nobody is asking you to wear a skimpy thong. Just get something that's not your standard go-to basic panties. Nothing wrong with a little lace to spice up the dresser."

"That's your thing Rias."

She smiled at that "What's the worst that happens? You pick up Issei let alone your sister?"

Sona could only shake her head at that. "Please don't joke about that."