When you grow up in a rich family, where you are taught from childhood to be an intellectual, to behave with restraint, coldly, not to be emotional, then as you grow older you begin to get irritated the childish behavior of his peers, their stupid boyish fights, loud laughter, bad manners and carelessness. And Dazai doesn't understand that it annoys him not at all because it's stupid, and because he himself will never be allowed to behave like that. When he was 17, his parents divorced. This template sweet family was broken into pieces. He hated his father, who always raised him to be a diligent son, sending him to all sorts of extra classes besides studying. Osamu hated him for cheating on his mother with that stupid, poor blonde that his father dared to bring into their house. He hated that stupid woman. And he was especially irritated by her stupid red-haired son - a boy shorter than Dazai himself, with bright red curly hair, with a small nose that was covered in freckles and green eyes with that bright sparkle in them that Dazai himself had long since lost.