Chuuya and Fyodor are enemies. Dazai hates Fyodor with his life because Fyodor have caused deathful damage to the Port Mafia

although, you, Fyodor's younger sister, loves Chuuya. You begged him to be your boyfriend, and because of how much you were begging, he had no choice but to accept it.

but then ofc, Chuuya didn't treat you right. Not because you forced him to be with you, that's not why he treats your harshly.

you always dress up whenever you both go out but Chuuya have never ever complimented you. He, instead, always scolds you for being late

"Again late?! Are you mentally ill or what?! I've been waiting for 30 minutes!"

Chuuya says in a scolding and irritated tone, not even noticing the new outfit you wore for him