In the start of the last year of middle school Izuku find himself in depression because of the bullying he's been getting due to him being quirkless, Kacchan (a name Izuku gave to Bakugou them they were kids) being the one bully that always goes for Izuku the most for being quirkless says something that makes Izuku do something very extreme.
After the last class of the day which has been quiet mostly, until Bakugou confronts Izuku at the end of the day. "Oi Deku what are you writing in that stupid book again!" Bakugou yells. "C-can you p-please st-stop calling me D-Deku, K-Kacchan please its not n-nice." Izuku stutters. "I don't care! Your quirkless why should anyone care what you think!" states Bakugou, "I got a idea why don't you answer by goddamn fucking question! And then you can go jump of a roof so you can a quirk and stop wasting other people's goddamn time and space!".
Izuku just stands there, stunned from Bakugou's statement. "Am I really a 'waste of people's time and space' or is Kacchan just saying this to bully me or something", Izuku thinks.
"Well! Answer my question Deku!" Bakugou screams to get Izuku's attention. "It-its m-my an-a-analysis journal on h-heroes for th-the future, so w-when I bec-become a hero I'll be pre-prepared." Izuku mumbles, Bakugou laughs at Izuku for what he just said, this shocks Izuku to the point where he starts to shake from fear of Bakugou's venomous laughter. "Is that your stupid excuse of saying 'I want to be a hero' your alway on about!", this startels Izuku to yell a statement Bakugou hates.
"Why can't I become a hero, I'm smart and brave! And I won't even want the money or become number one, unlike you Kacchan, I would do it for the fact that I'm saving a life, lives, business, companies, etc! I would do it because it's the, Right! Thing! To! Do!
This sets the eruption of a volcano, which is Bakugou's anger off the charts. He grades Izuku's shoulder and blasts it with his quirk called explosion, this sends extreme amounts of pain to Izuku's shoulder, he lets out a quiet but shredding scream. After this Bakugou does a sadistic smile and whispers into Izuku's ear, "You know what I won't waste my time anymore, you should just go and jump of a roof cause no one likes you, Izuku."
After that Bakugou leave, and this lets Izuku think on what's happened. He when remembered what Bakugou said from the beginning, 'And then you can go jump of a roof so you can a quirk', this puts the icing on the little fragile cake, Izuku writes a message on a piece of paper and walks to the school roof, he then throws his school bag and journal down and he starts to question his life choices and jumps.
Thud!
Izuku wakes up on the ground next to the hero killer Stain, he then realises that Stai is looking at him so he quickly shifts to the side to get away from him, but he stops when he feels a sudden pain through his whole body.
Stain looks at him and smiles.