Omg yesss, another person who's in both the KHR and AssClass fandom. What do you think of a crossover between the two with Nagisa as Tsuna's teacher?

Sounds awesome! The interesting question would be this, though: Would this be during, before or after KHR canon (as in the duration of the manga)? And what kind of teacher are we talking? Following AssClass canon with Nagisa as a schoolteacher? Assassination teacher? Tsuna picking up ninja powers bc Nagisa taught a pre-school class?

Possibilities, possibilities!

Imagine: Karma and Nagisa in the BNHA universe! They attend Kunugigaoka High, an increasingly popular hero school that focuses on producing highly specialized heros. Class E is supposedly for students with discipline problems / on probation but in actually is for those training to be underground heros (it’s better their existence isn’t advertised, for obvious reasons).

okay SO

I really love this concept, but let me take certain things in my hands, if you will. 

I feel like Nagisa is one not to have a Quirk that expresses in normal circumstances. 

For, quite a long time, he believed he was Quirkless because “Nagi” only activated when Nagisa really wanted something, and only as sharp eyes that analyze every move the object of his affection has, without them realizing so. (Which led to people not discovering his Quirk, because the very nature of it was not to be seen.) 

It wasn’t until about ten, when along the eyes, scales began forming. His mother freaked out, and so did Nagisa, making him self consious and not wanting to use his Quirk.  

He entered Kunugigaoka with the false pretense of being Quirkless and trying the General Department. But everything changed when Karma entered the picture. 

Nagisa has the… unusual tendency to just activate his Quirk when something of his interest appears before him, and since no one had actually caught him using it, he never bothered to control it. 

Until Karma. 

Turns out Nagisa is super interested in Karma, and his Quirk activates almost all the time Karma is around. Which obviously draws more attention to his Quirk the more he uses it. When Nagisa starts getting more comfortable, the scales even begin to appear. 

Which led to it being discovered he has a Quirk. Which has been considered “dangerous” and “a hazard for not knowing how to handle it”, escencially landing him on the E class. 

The Class is for “Problem Children” in the eyes of everyone else. But it’s more accurately a class for “Kids who the school can’t control and need to be under survillance” or even more accurately, “Potential Villains” and are treated as such. 

When Korosensei entr the picture, everyone kind of freaks out because a Villain is going to take care of other Potential Villains, But Korosensei, despite teaching in the way a Villain would, is resposible for making them know that society doesn’t determine who is a Villain or a Hero. 

“A Villains can do good things, and a Hero can do bad things,” he told Nagisa, when he was scared of harming someone with his Quirk. “People like to label things in ways they can understand, but that does not mean you’re evil or good. Just focus on being a good person, and focus on doing things you believe are okay. People might still call you a Villain, but you know you’re doing the right thing.” 

With time, Nagisa manages to control his Quirk. Which is turning into a mosnter like snake that doesn’t have a lot of Hero value, but could kill someone in an instant. 

It still makes him dizzy to use it full power, but he’s getting there. 

(And yeah, a lot of people do wonder if he’s a girl or a boy bcs of the kilt.)