Dazai was your younger brother, you loved him very much, but you had to act like you hated him, treating him badly, also making your parents always scold you

you knew that Dazai would only end up hating you and so he did, he started to hate you as time went by, he wouldn't even want to talk to you anymore

one day you were arguing with Dazai

Dazai: "I HATE YOU, I HATE YOU, I HATE YOU, YOU DON'T KNOW HOW MUCH, YOU ARE THE PERSON I HATE THE MOST IN MY LIFE, YOU WERE A TERRIBLE SISTER!"