1k+For Better or For Worse » by Syluk The Pirate King Monkey D. Luffy didn't come back to save the world. His only wish is to save his friends and assure their absolute happiness this time around. Even if he has to turn said world upside down while trying to achieve that. For better or for worse. (Hopefully not your usual Time Travel AU, OP!Luffy, and general chaos and craziness that he brings into the world)
One Piece, T, English, Family & Humor, chapters: 13, words: 93k+, favs: 4k+, follows: 4k+, updated: 2/11 published: 4/27/2016, Luffy, T. Law, unknown 1, Corazon
196Fumbles & Fairytales » by Terminally Introverted Alfred is a professional football player, and his life is a constant stream of fame, fortune, and luxury. But something is missing. When he comes across his old high school yearbook and remembers the deep friendship he had with an upperclassman named Arthur, he's determined to find him, and he does – in a psychiatric hospital.
Hetalia - Axis Powers, T, English, Romance & Friendship, chapters: 15, words: 81k+, favs: 163, follows: 212, updated: 11/21/2020 published: 12/19/2015, England/Britain, America
6k+Second Wind » by The Lost Samurai Luffy and Zoro awaken in two different parts of East Blue, both with the same thing on their mind. Protect the crew. There would be no failures this time around, Captain's orders. As bits and pieces of the unknown past that the two comrades share are gradually revealed, the rest of the crew can only speculate. For all their absolute resolve, they're hiding something. On hiatus.
One Piece, T, English, Adventure & Humor, chapters: 69, words: 277k+, favs: 10k+, follows: 11k+, updated: 10/18/2020 published: 2/11/2015, Luffy, Zoro, unknown 1
260Parallel Worlds » by BrownieFox Tsuna gets sent to a parallel world where he has a twin brother Ieyasu is the Vongola 10th. Summary completely sucks. Disclaimer: I own it all! Kufufu! No, just kidding. I own nothing.
Katekyo Hitman Reborn!, T, English, Adventure, chapters: 13, words: 30k+, favs: 794, follows: 994, updated: 6/21/2020 published: 2/18/2013, Tsuna/Tsunayoshi S., Vongola 10th Generation
268The Sky and his Sun » by Adriana Espan Where Tsuna is the Sky Arcobaleno, and sky arcobalenos look like teenagers who don't age or die. He is not the Vongola Decimo. The question is, if Tsuna and Reborn were together in the past, why did they decide to part ways after becoming Arcobalenos? R27/slight All27. AU. Follows canon's plot but will skip the parts that are deemed as unnecessary.
Katekyo Hitman Reborn!, T, English, Romance & Angst, chapters: 17, words: 72k+, favs: 1k+, follows: 1k+, updated: 4/18/2020 published: 8/23/2014, [Reborn, Tsuna/Tsunayoshi S.] Arcobaleno, K. Hibari
249 The Timeless Clown » by Tyki075 It's been around 250 years since the end of the Holy War and Allen's been cursed to walk the Earth for eternity, timeless. One night he comes across Dumbledore and saves him from Akuma, to repay him Dumbledore hires him as the new Defense Against the Dark Arts teacher. It doesn't take long for the Golden Trio to get interested in this new teacher. Yullen
Harry Potter & D.Gray-Man, T, English, chapters: 7, words: 54k+, favs: 497, follows: 600, updated: 4/14/2019 published: 5/11/2015, Harry P., Ron W., Hermione G., Allen Walker
101 Just a Training Trip » by Luscinia Evan "It's a training trip," Reborn said. And Tsuna should have seen it coming. A week later found the young Vongola Decimo sitting in the class of 3-E, undergoing lessons to become an assassin.
Katekyo Hitman Reborn! & Assassination Classroom/暗殺教室, T, English, Humor, chapters: 2, words: 2k+, favs: 607, follows: 753, updated: 1/18/2019 published: 6/4/2014, Tsuna/Tsunayoshi S.
26 Destroyer of Time I: Innocent Magic » by ToiletBrushCat While investigating disappearances from the villages around Hogwarts, Dumbledore finds himself incapable of destroy the machines responsible. So he calls in the professionals. The Triwizard Cup is fast approaching and the Exorcists will be hard pressed to keep the schools protected while dealing with a new threat… And coping with their new, somewhat immortal status and Noah allies.
Harry Potter & D.Gray-Man, T, English, chapters: 2, words: 6k+, favs: 135, follows: 213, updated: 12/30/2018 published: 8/6/2017, [Allen Walker, Kanda Yuu]
12Tattoo of a black sun and orange flame » by NorCal.NEH Reborn was sent by the ninth to train decimo but when he got to japan the person he is supposed to train doesn't even have sky flames but his weak brother does. Tsuna was dieing because of a disease where one day you wake up with a tattoo and sick and in order to cure it you have to find your soul mate who has the same tattoo. Reborn has seen Tsuna's tattoo before... on himself.
Katekyo Hitman Reborn!, T, English, Romance, chapters: 3, words: 1k+, favs: 82, follows: 101, updated: 9/3/2018 published: 10/27/2015, Adult Reborn
12The Cielo Angelo Hacker » by NorCal.NEH Reborn is sent by Nono to teach his grandson to become Decimo but there are some problem like Tsuna is mute, traumatized, somehow know about the mafia, knows how to uses his flames but they were once sealed, Is the worlds greatest hacker and why he has a matching tattoo to reborn in the same exact spot and many more. R27, Strong tsuna, Mute Tsuna, Smart Tsuna, Adult Arco.
Katekyo Hitman Reborn!, M, English, chapters: 2, words: 1k+, favs: 117, follows: 155, updated: 6/23/2018 published: 10/4/2015, Adult Reborn, Tsuna/Tsunayoshi S.
2 Sunshine » by NorCal.NEH This is about one of my childhood songs which is You are my Sunshine. It is a R27 where Tsuna comparing the song to Reborn who he sees as his sunshine. Character death but also afterlife. Adult Reborn.
Katekyo Hitman Reborn!, T, English, Romance, chapters: 2, words: 1k+, favs: 20, follows: 21, updated: 6/23/2018 published: 11/8/2015, [Adult Reborn, Tsuna/Tsunayoshi S.]
119 Assassination Classroom: Vongola Style! » by 00JellaNilzzZ AU. In which the unconventional, chaotic cast of KHR joins in and meets the youthful assassins in the unnatural settings of Class E.
Katekyo Hitman Reborn! & Assassination Classroom/暗殺教室, K+, English, Adventure, chapters: 8, words: 22k+, favs: 674, follows: 698, updated: 4/9/2018 published: 10/6/2015, Arcobaleno, Vongola 10th Generation, Nagisa S., 3-E Students
36 Concerning the Watchmen » by SiZodiac On the devastated streets of Manhattan, Steve Rogers sees a foreigner who bears a likeness to a man he distinctly remembers from seventy years ago. And an argument that somewhat changes his perception of the world. Post-Avengers. slight Captain America: The First Avengers AU. /No America/
Avengers & Hetalia - Axis Powers, K+, English, Drama & Friendship, chapters: 2, words: 3k+, favs: 363, follows: 106, updated: 4/7/2018 published: 9/10/2012, Austria, Captain America/Steve R.
437The Kid That Was Vongola Decimo » by Initials-eMpTy AU. After dying in a historic way, the Vongola Decimo found himself revived in a parallel world. He has an older brother who is the Decimo candidate instead of him and thankfully does not have to undergo Reborn's tor-tutoring. In fact...maybe he should give Reborn a hand with teaching his new "student"! 4 year old Tsuna.
Katekyo Hitman Reborn!, T, English, Humor & Family, chapters: 12, words: 35k+, favs: 2k+, follows: 2k+, updated: 1/20/2018 published: 2/2/2015, Tsuna/Tsunayoshi S.
223Thirst » by zairaswift Thirst is a virus. It copies all data available and automatically organises the data into files. Tsuna is a physically weak teenage boy, with a rather scary personality, who also has a sense of humour (sexual innuendos). He also has a very troublesome twin brother. AbusiveTwinForTheWin. Hacker!Tsuna
Katekyo Hitman Reborn!, T, English, Drama & Humor, chapters: 17, words: 57k+, favs: 728, follows: 869, updated: 1/3/2018 published: 10/6/2015, Byakuran, Reborn, Tsuna/Tsunayoshi S., OC
106 A Not-Quite Sixth Sense » by AthanatosOra The doctors called it heightened anxiety. His mother called it a gift. His peers called it weird. Tsuna himself didn't know what to call his freakishly accurate, absolutely ridiculous paranoia, since he was already too busy trying to handle the fact that it was there at all. As if that wasn't enough, Chaos ensues following a not-baby called Reborn and his greeting of "Ciaossu."
Katekyo Hitman Reborn!, T, English, Humor, chapters: 2, words: 10k+, favs: 1k+, follows: 971, updated: 12/16/2017 published: 12/12/2015, Tsuna/Tsunayoshi S.
93 God's Saviour: Satan's Destroyer » by The Happy Jester Komui Lee successfully builds a living time machine, but the Black Order is attacked by an army of Akumas, and several of them escape through the device. Allen Walker is the only Exorcist who manages to enter the time machine before it is destroyed, and finds himself in future-day Tokyo, where he encounters the True Cross Order, and one very interesting person named Rin Okumura.
D.Gray-Man & Blue Exorcist/青の祓魔師, T, English, Adventure & Humor, chapters: 3, words: 13k+, favs: 289, follows: 370, updated: 7/31/2017 published: 7/6/2015, Allen Walker, Rin O.
411Namimori Gods » by Sweet-With-Talent Namimori is the home of two divine entities: the Goddess of Luck and the God of Order. Every four generations, they reincarnate in Namimori born-children. The search for the goddess has begun, will Tsuna be able to find Hibari's wife?
Katekyo Hitman Reborn!, T, English, Humor & Adventure, chapters: 17, words: 44k+, favs: 907, follows: 1k+, updated: 7/11/2017 published: 2/6/2012, Tsuna/Tsunayoshi S., K. Hibari
129 We're All Hitmen Here » by aTreeCat Yamamoto's latest mission (ostensibly): to join Class 3-E as their home economics teacher. Shenanigans ensue.
Katekyo Hitman Reborn! & Assassination Classroom/暗殺教室, K+, English, Adventure & Humor, chapters: 6, words: 16k+, favs: 743, follows: 933, updated: 7/7/2017 published: 2/1/2016, T. Yamamoto, Karasuma T., 3-E Students, Koro-sensei
162Master of the Sky » by FrostHitsugaya19 Tsuna was ignored by his parents because of his so-perfectly-younger-twin-brothers named Takuya and Tsurumi. But HE doesn't ignores them because even though they are like that to him, he respects his position as their family. Many things happened until the dame-Tsuna THEY know changed. How if Tsuna would be a different person unlike what they have known? (FULL DETAILS INSIDE)
Katekyo Hitman Reborn!, K+, English, Hurt/Comfort & Family, chapters: 48, words: 113k+, favs: 417, follows: 429, updated: 6/30/2017 published: 11/5/2015, Tsuna/Tsunayoshi S., Vongola 1st generation, Vongola 10th Generation, OC