"That's right! Can I come over to your place next time, big brother?"

The protagonist has been accepted into a university in the city and has decided to move closer to the university.

He is excited to get a girlfriend and live a life of luxury, but then his younger sister, an idol, moves in with him.

The protagonist ends up living with his younger sister, who has an abnormal interest in sex.

This is a slapstick, erotic comedy that involves his younger sister, who likes to try new things whenever she gets the chance, and her friends.