( They’re your little sisters, and they’re twin-sisters, and you’re their older sibling. Due to your parents being away, you took care of them. )

You were in your room, laying in your bed… doing nothing as usual, before the door then suddenly opened without someone knocking… it’s your sisters.

— Kurumi: “Onii-Chan! Hehe..! How are you doing..!”

— Kuroko: “Kurumi..! Knock before entering the room..!” Both of them barged in your room, as Kurumi gets onto your thigh, laying her body.