This story follows WhiteTigerwolf's Polyjuice challenge: 2

This challenge is as follows:

Must be Harry/Hermione

Harry and Hermione must both drink Polyjuice potion contaminated with cat hair

Transformation must be permanent

If Harry and/or Hermione become Animagus. It must be a feline form.

At some point (it doesn't have to be immediately after their transformation) Hermione must go into heat.

Harry and Hermione must be provided with a way to hide their transformations from others.

Harry must spend summers with the Grangers

Harry must learn how to fight in their "new" bodies

Cream and/or milk and fish must become a beloved food of Harry and Hermione.

Harry and Hermione must be wary of Lupin at first. (They are part feline while Lupin is part canine.)

Harry and Hermione gain the ability to communicate with cats and can use this ability to speak with each other

Recommended:

Lemons

Kittens (Harry gets Hermione pregnant)

Sirius declared innocent

Harry and Hermione adopt a kitten or cub

Mentor Snape

Story start:

Harry couldn't help but feel worried about his best friend after they had to leave her behind. She had sounded upset but Ron had talked Harry into leaving after Hermione told them to go. Harry couldn't help but feel that the potion was just a huge waste and on top of that his best friend was now upset.

Harry had carefully pulled off the now oversized blazer and then used the shirt to cover his sneeze from the overabundance of dust that covered the stall. Harry had to carefully pull his own undershirt and blazer on because he couldn't see anything a few inches in front of his face without his glasses. He then dropped the oversized pants and then pulled on his own pants.

Harry then pulled his glasses out of his pants pocket and put them on before he left his stall. Now that he could see he looked in the cracked mirror to double check that he Polyjuice potion had completely wore off. Taking that potion to find out if Malfoy was the heir of Slytherin was a dud. He didn't know who the heir was either. He even had the nerve to wish for the heir to harm his best friend next. It had taken Ron grabbing his attention by asking the next question on who he thought was the heir.

When Harry turned from the mirror, he saw that Ron has just started to pound on the stall that Hermione had occupied.

"Come on, Hermione. We have loads to tell you." When Hermione refused to come out Harry started to feel a feeling of dread. Could Hermione have had an allergic reaction to the potion? Was her potion made wrong? No that couldn't be since both his own and Ron's portion was from the same batch. Was there something wrong with her last ingredient? Did she add her hair wrong?

When no one was looking he pulled out his flask and grabbed the last of the Polyjuice and one of the last of the hairs from Hermione leftovers just in case something was wrong. If Hermione couldn't be fixed, then she wouldn't be going through her problems on her own. She had proven her loyalty in spades. Now it was his turn to return the favor.

When Ron started to get frustrated when Hermione wasn't answering Harry felt he had to step in.

"Hermione, could you please tell me what is wrong? Was there something wrong with the potion? Maybe I could help?" Harry never noticed the surprised look that Ron gave him when he didn't include him in that offer. Ron scowled at that. He had started noticing that they were growing closer over since they had a discussion alone when the year started.

Instead of Hermione answering Moaning Myrtle glided through the stall door, looking positively gleeful.

"Oh, wait till you see. It is awful!" Myrtle chortled as she glided to the side of the lock slid open. When Hermione fully left her stall Harry noticed that she had her robes over her head. With every breath her shoulders shook. Harry could easily tell that she was crying hard under her robes and that brought a stab to her heart.

When Harry glanced at Ron, he could tell that he didn't even notice that his friend was upset. Ron just charged right ahead. "Why are you holding your robes like that, Hermione? Even if you still looked like Millicent. It can't be that bad." Ron said chuckling.

When Harry went to step in to tell Ron off when Hermione suddenly let her robes drop. Both boys looked on stunned for a few seconds, before Ron burst out laughing and started leaning against the sink behind him. Harry glared at Ron before he slowly started walking towards Hermione. He kept his posture relaxed and nonthreatening as he could.

Hermione's long-pointed ears were now lying flat on top of her bushy brown hair. He knew that Hermione would never hurt him, but Hermione now was part cat and cats usually attack first when upset. He had to be careful. He could see Hermione's bushy tail lashed from side to side in her agitated state.

When Harry reached his best friend, he gently pulled Hermione into an awkward hug. Hermione's once peach skin was covered in a downy brown fur that was soft where Harry touched her. Hermione leaned into the crook of Harry's neck, inhaling the scent of her best friend. Tears dripped from her slitted brown eyes, ran from her whiskers, and onto Harry's robes. He never noticed that his outer robes were getting wet. He was too concerned for his best friend's emotional state. Her ears slowly perked up from the flat position and gently flicked from the breath from Harry's exhales.

Her response was muffled from her nuzzling into the crook of Harry's neck. "Millicent Bulstrode must have a cat! The potion was never supposed to be used for animal transformations!" It seems his first instinct to grab the rest of the potion was correct. Her last ingredient was what went wrong. He thought of drinking the potion now, but he needed to get Hermione help first to find out if her condition could be fixed before pulling that stunt.

It had taken seconds after Hermione's muffled response to get Ron to stop laughing at Hermine's misfortune.

When Hermione pulled away from Harry, she noticed a part of her that didn't want to leave his embrace. Harry gently brushed at her tear streaked before he glanced at the ghost when she spoke.

"You will be teased something awful." Myrtle said cheerfully. Something niggled at the back of his mind when she mentioned being teased.

Harry held Hermione closer when he turned a glare to the resident ghost. "Myrtle?"

When the see-through ghost gave a noncommittal sound to let him know that she was listening, he continued. "Didn't you tell me earlier in the year that you were bullied in school?" When the dots still didn't connect, he continued.

"Why are making fun of someone else's misfortune when someone did the same to you?" Myrtle looked down guiltily. "Yes, I was. I am sorry, Hermione. I should not have been acting so cheerful about something terrible happening to someone else like that. I am going to make it up to you by letting Madam Pomfrey know what is going on and to prepare for a patient." With that the teen ghost floated through the wall.

Both preteens had forgotten about the red head in the room and so missed the scowl they were receiving.

Harry had grabbed Hermione's hand to get her to look at him. "I don't care what you look like. You are my best friend. I want you to be safe and healthy. And… if you will have me… Possibly something more. We both know Madam Pomfrey never asks too many questions." Both also never noticed Ron's clenched fists when Harry called Hermione his best friend but stopped before either of the other two could notice.

Hermione blushed underneath her fur and was thankful that her dark fur covered the blush. To think that Harry thought about her like that. Harry noticed her inner ear had pinked but never mentioned it.

"Do you really want me to be your girlfriend? But I am just a bucktooth, know it all, bookworm." Hermione had ended her comment depressingly. Harry grabbed her drooping head before forcing her to look him in the eye. Her ears had started to droop at the thought of all the comments that she had heard over the years.

"Of course, I would want you as my girlfriend. Why wouldn't I want you? You may say that you are bucktoothed? I say that they are extremely cute and could be easily fixed if it bugs you so much with the help of magic. You say that you are a know it all? I say that you are knowledgeable and bright. You have saved my life last year with the potions and the devil's snare. You have helped me keep my grades on the straight and narrow."

Harry raised his hand when Hermione opened her mouth to refute his statement. "You can be pushy, but you are only like that because you care and I admit that sometimes I need a good kick in the pants to get into gear." Hermione just looked thoughtful at his answer.

"And you say that your hair is bushy? Have you seen my hair? I say that your hair is untamable just like your personality. I am sure that they have a shampoo that could help bring your hair into a more manageable level that we can get you. So yes. I do want you to be my girlfriend… That is if you would have me." The thought that Harry would still want her even if she was still furry calmed her down greatly. "I would love to be your girlfriend, Harry."

They then glanced around and just now noticed that Ron had left them sometime between Myrtle leaving and them getting together. "I guess Ron went to make sure that Pomfrey was ready for Hermione." Harry stated doubtfully.

It had still taken a long time to persuade his girlfriend to leave the bathroom and get help from the school nurse. It had taken Harry covering Hermione with his invisibility cloak to make sure no one saw her on the way she was now. It had taken a good thirty minutes to make it across the school and down a flight of stairs to make it to the hospital wing. When Madam Pomfrey had first seen Hermione, she had automatically told Hermione to sit down on one of the Hospital beds. After finding out what had caused the transformations Madam Pomfrey had kicked him out and told him to try to get some sleep.

Harry had point blank refuse to leave his girlfriend alone and so sat down on bench outside the Hospital wing and waited to be allowed into the Hospital wing. Madam Pomfrey gave up on the fight to get Harry to go to bed and started to work on her only patiant.

Harry's so-called friend had found him after fifteen minutes after he sat down to needle him to come up to the Tower and play chess with him. Harry had vehemently refused after Ron made a statement that Hermione will be fine and that he should go relax in the common room.

To say that the two of them had a blowout was an understatement. Ron had finally got the message that Harry would not leave Hermione in her current state when Harry had nearly gotten violent with him. The last words between the two former friends were not pretty. Ron had left, abandoning both Harry and Hermione in Harry's eyes.

It was another thirty minutes after Ron had left when the doors of the Hospital wing opened. Harry had hurried to his feet and turned toward the doors. Madam Pomfrey stood in the entrance of the hallway while wringing her hands. Her face was full of worry and concern. "I had heard raised voices a little while ago. I suppose that was you, Mr. Potter?"

Harry had nodded when he answered. "Me and…" Harry shook his head. "Never mind. How is Hermione? Can I see her please?" Madam Pomfrey's gaze softened. "Normally I would have said no, but she has been asking for you since I kicked you out. Come on in, Mr. Potter."

Harry smiled and walked into the Hospital Wing. Madam Pomfrey quickly led him over to the only occupied bed that was curtained off. She partially opened the blue curtain and stepped inside after Harry had went inside. She then closed the curtain behind her and moved over to the side of the bed.

Hermione was sitting up in her bed. Harry could see that Hermione was not wearing her school uniform anymore. Instead she was wearing a light-blue hospital gown that from the waist up. Her lower half was covered by a dull grey blanket.

From where he was standing it looked like his suspitions were currect. The potion accident couldn't be fixed. Time for plan B. Her slitted brown eyes looked red rimmed like she had been crying earlier. Her ears and tail were drooped seemed to support that theory until she saw Harry approach. From the look of it. Hermione's fur wasn't as untameable as it was before they arrived.

"How are you, Hermione?" Hermione's red rimmed eyes teared up and began to travel down her face. Without waiting for Pomfrey to give the okay Harry rushed forward to bring the milk chocolate furred girl into his arms. With his mouth so close to her pointed ears he didn't bother to speak louder then a whisper to make sure that Pomfrey couldn't hear what he said. "No matter what I won't leave you to go through this alone, Hermione. Even if I have to change to be with you. I will do what ever I have to do to stay by your side."

When Hermione pulled back to look into her boyfriend's eyes in confusion Harry only gave her a soft smile in return. Harry sat down on the bed and then pulled Hermione into his lap. Within seconds she was snuggled into his chest and breathed in his comforting scent.

"Now, Madam Pomfrey, what happens now that Hermione is stuck like this?" When Pomfrey went to question how he knew that Hermione is stuck like this he interupted the nurse. "It has close to an hour since I had left my girlfriend in your care. With the empty potion containers cluttering the bedside table and the fact that the only difference between the Hermone of an hour ago and the Hermione that I hold right now is her finely trimmed fur. The only way she would be left like this is if you could not turn her back."

Both Madam Pomfrey and Hermione were surprised at Harry's deduction. Hermione just shook her head. "I should have known that you were hiding your true intelegance. You are going to have to explain to me the why of you dumbing yourself down later, Mister Potter."

Harry looked down ashamed before he nodded. He couldn't bring himself to look either female in the eye. This continued before Madam Pomfrey cleared her throat. "As I was about to say. Hermione is now stuck like this for the rest of her life. She will now officially be classified as a Neko by the ministry."

When Harry looked contused at the term 'Neko' Hermione decided to explain the term. "Neko is the Japanize term for a 'Cat-girl.'" With Harry's confusion cleared Madam Pomfrey continued.

"I had tried everything I could to turn her back and nothing affected the change so I let the potions run their course and then gave her a shedding draft. It didn't get rid of all the hair but it did allow me to trim the remaining hair so that it could be more managable. I also trimmed her claws since they were originally going to be more painful when they started curve if they were left alone."

She looked pointedly at the young girl in her boyfriend's arms. "Can I tell him?" When she shook her head Madam pomfrey was about to work her information around her medical information when Hermione started to stand up from Harry's grasp. "I will show him instead."

Harry placed his hand around her wrist when she started to reach for the belt that held her hospital gown closed. "Are you sure you want to show me this?" Any doubt that was in her body language immediately hardened into determination. "Yes. I trust you." With that she pulled the the hospital gown open Harry quickly turned away from his best friend's nearly naked body. Hermione sighed before she grabbed Harry's hand.

"Don't worry, Harry? I want you to look." When Harry turned toward his girlfriend but refused to look at her exposed chest Hermione grabbed Harry's face. "I want you to see me like this." Harry didn't fight Hermione when she guided his gaze down toward her chest. Harry could feel his cheeks heating up as he gazed upon his girlfriend's body.

The only thing that Hermione was wearing was a pair of white cotton panties that had been adjusted to account for her new tail. Hermione's normal budding breasts looked to be a good handful, but Hermione had four more pairs of nipples going down her stomach, evenly spaced between her chest and belly button.

"Madam Pomfrey doesn't know whether they will be… fully functional like my regular breasts will be." Hermione said, smiling softly, when Harry's blush deepened at the word 'breasts.'

"Madam Pomfrey doesn't want to remove them, just in case." Hermione closed her gown again, much to Harry's disapointment.

"Is there… any other changes?" Harry asked. "My tongue feels rougher." Hermione said as she stuck out her tongue which makes Harry chuckle. "It looks the same to me." Madam Pomfrey spoke up after that.

"I am still doing my research, Mr. Potter. I have never experienced anything like this before. I will try to give you two more information when it becomes available to me. But, so far, the rest of her body features and functions seem to be completely normal other then the obvious changes." Harry nodded before he glanced between Poppy and Hermione.

It is time to put my plan into motion. "Do you mind if I speak Hermione alone for a little bit?" Madam Pomfrey looked doubtful before Harry offered a compromise. "How about while I talk to Hermione, you can go to Headmaster Dumbledore, Professor McGonagall, and Professor Snape about this situation. Headmaster Dumbledore and Professor McGonagall need to know about this situation and get us a room since I am sure we cant stay in the dorms." At Harry's use of the word 'we' Madam Pomfrey rose a questioning eyebrow but didn't comment. "You can get Snape to refill any potions that you used to treat Hermione."

Madam Pomfrey started to think deeply before she nodded. "I will leave you two alone for the few minutes while I get the professors that are needed." With that she turned around and left the two alone.

Harry turned toward his new girlfriend and saw her ears were laid down in the same way a cat would when scared. Harry grasped her hands in his own before giving her a small smile.

"Hermione, I know you are scared but I will never leave you alone. I am even willing to put myself in your shoes to prove that I will never leave you." Hermione looked confused when Harry had said that but gasped when Harry pulled out a flask and dropped something into it. Her mind was racing and just realized what Harry was going to do seconds before Harry gulped down the contents of the flask.

Harry was barely aware of the gasp as fire started gushing through his vains. "Mr. Potter!" Yelled out a voice from behind him.

Harry could feel is features bubble and shift. Black fur started to cover his exposed skin and his ears sunk into his head. From the top of the head two pointed cat ears broke through his messy black hair. Pain bloomed from the seat of his pants. They felt too tight. With his new claws Harry carelessly ripped through the back of his pants from the new hole a bushy cat's tail slipped through.

When Harry started to feel his eyes itch and his vision started to blur he knocked off his glasses and closed his eyes. When he openned them a few minutes later as sat there in his seat panting everyone noticed that his emerald green eyes were now slitted.

"Mr. Potter! What do you think you are doing?" Harry slowly turned toward his audience. Hermione, Madam Pomfrey, and Dumbledore looked at him in disbelief. Snape looked at him with an unreadable face but from his eyes he could see a glimmer of respect.

Harry grimaced in pain before he started to speak. "I am not going to let my only friend go through this alone. If I can do anything that can help her through this, then I will do it. Hermione has been the only one who has been by my side through all the heir of Slytherin. Ron had betrayed us by leaving us in our time of need and just wanted to play chess when Hermione was inside dealing with this." Harry gestured in Hermione's direction.

Professor McGonagill's mouth narrowed into a straight line in displeasure, but nodded at his explatation. This was the type of loyalty that she would have expected from the his parents. Both were loyal to a fault to those they trusted.

McGonagill sighed and pinched her nose before she spoke again. "Very well Mr. Potter. I can only hope that you do not regret your decision since this cannot be fixed. I am going to have to give you both a room together now do to your condition. When you two are able to leave I will teach you a more powerful glimmor to hide your… condition and then take you to your new room. Tomarrow I will take you two to Gringotts. I have a feeling that they can help us with enchanted jewlery that would be better then the spell I will teach you. Have a good night you two." All three left the two nekos alone to be looked over by Madam Pomfrey.