What if something different happened in the Chamber of Secrets? What if Harry wasn't so resigned to his death and wanted to live? With one simple change in mindset, the whole universe changes. Let the sun rise on a new beginning, on a new family. (It's on Fanfiction.net too)

"Maybe, in some parallel universe...we are still together...and so very happy." - Anonymous

KHR and Assassination Classroom crossover Tsuna was an assassin. His intuition and shot were unrivaled. He knew many people in the Mafia including the infamous assassin Serpentine. Nagisa was an assassin. He had a natural talent to kill. It was just simply that. Not to mention the fact that he was good friends with one of the most dangerous assassins ever, 27. The two teens struggle to hide their identity as suspicion closes in on them. "What do you mean that I'm an assassin, Koro-sensei?" "That's quite a wild conjecture, Reborn." I DO NOT OWN KHR AND ASSASSINATION CLASSROOM.

"I won't give you a single clue to remove the curse Sawada Tsunayoshi" Sawada Tsunayoshi was mute and useless with the reputation of Dame-Tsuna. Sawada Hayashi was atheletic and pretty much the idol of the school. They were twins yet Hayashi would step on Tsuna. Who would know that this Dame-Tsuna was Kaitou 27 or Hacker de Cielo, one of the greatest hacker in mafia history. What would happen when Reborn entered proclaiming he would train Hayashi as the tenth Vongola mafia boss? What are the dark secrets revolving around the two of them? What was the masked truth?

Reborn invited Tsuna and the others for a visit in Ikebukuro to meet a certain someone. Most of the guardians think it's only a vacation, but Tsuna thinks there's something else in their visit.

What if Tsuna wasn't as blessed as he was? What if he had a twin brother, tsunayoshi? What if he was a poor child that was negleted by his parents? What if he wasn't the successor of Vongola... What's this, he doesn't have the sky flame instead-

Yuri and Yamamoto are best friends but they plan to just have lunch and enjoy a week playing baseball but Fate didn't allow. Murata, Ken and Yuri was able to arrive at Shin Makoku safely but an unexpected guest had arrived with them. What kind of Chaos will Yamamoto cause at Shin Makoku? Original Author Ciel Black018 from fan fiction.net

Tsuna is sent to a parallel world where he isn't the Decimo. Apparently he is hated by his family because of his horrible crimes, so he gets the blame for all their problems. He has a twin and younger brother now so his life is pretty much a train wreck now. He has to hide his secret and pretend to be Dame. He hates the treatment and only the comfort of his friends keep him from lashing out. But he will always be always be the forgiving sky. And as always you come to love this little fluff ball. I know I already have a parallel world fic but this is different. Also an original.

*SEQUEL TO MASKED TRUTH On a fateful day Tsuna had met an unconscious boy who looked exactly like him. It was found out that this boy was Sawada Tsunayoshi's parallel self. Temporary called Revano, the teen was a genius, smart, excels in combat, and as told by Fuura the ranking prince was the greatest mafia hacker. There's just two problems. Revano lost his memories. Tsuna and his friends are fighting against Byakuran God of the parallel worlds. It is now up to Tsuna and Reborn to decide how to deal with this once and for all. But how could they be sure that Revano will stay put? That he will not just escape and try to retrieve his memories by himself? "When two parallel selves meet, it will take a great toll on whoever keeps the balance of the world." (Choice Arc) (Actually a twin-fic)