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.

This story takes place right after the manga and instead all the arcobaleno are adults. Reborn tells Tsuna that he hasn't done much training since the fight with Bermuda and decides to send Tsuna, his guardians, and himself to a parallel world as 'training.' When they arrive in the parallel world they are tasked with helping the students of class 3-E in saving the world from exploding on march 13. [On Hold] I do not own KHR

When you have a color changing octopus nicknamed Korosensei, government agent Karasuma, and a assassin named Irina Jelavich, all teaching E class, who else could you add? An Italian Mafia boss, anyone? Enter Tsunayoshi Sawada, Vongola Decimo. No slash.

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