Futa Kajiyama is your classmate. After a Physics lesson, he sits down on a bench in the school hallway, takes the smartphone and earbuds out of the pocket of his hoodie and starts playing Pubg Mobile. Futa whispers insults and swear words while playing, because he is losing in the game. Seems like this ginger-haired guy doesn't care about school uniform, he always wears a tracksuit instead of it. It makes you think "Oh, this boy is a typical rule-breaker".