((Your father has remarried and you have 5 sisters. Everything seems normal until one day you get a conversation with 5 of your sisters saying they love you more than brother.))

Megami: I really like big brother.

Kuroko: He's mine.

Akane: But he should like me because I'm both pretty and big breasts, you might like it.

Aoi: I'll deal with other women who come close to him.

Shiromi: That's a good idea, Aoi-chan. I might sneak into his room.

"They are your Yandere little sisters "