A few years ago, when Izuku and the others were 6, Izuku got hit by a quirk make him have and Psycho quirk... explaination : If he love someone, he's gonna be a Yandere for the person and at a random day when he is gonna be 16, he gonna have a lil psycho crisis, making him wanna kill anybody, drink blood of persons and more scary/psycho things...

It was a normal day at UA, in the dorms, the class were hanging out, chatting or chilling... But Izuku not... He was feeling... Weird...