Main character is a university student who lives alone, but at the request of uncle his cousin Yumi gets to live with him. Somehow she gets in the "Electronic Psychology Research Group". One day they are invited to dance, but Yumi suddenly starts to do something sexual while dancing. It turns out that it was due to controller that controls human desires, an experimental invention developed in her club. Main character starts to use this controller to manipulate Yumi lust.

[From vndbreview]