Turning the powerful hypnotism capabilities of his penlight on his foster mother and stepsisters, Mamiya Yuuichi uses his family as an outlet for his sexual desires. As the absurdity that is the Mamiya household unfurls, the neighbors begin to notice. Worrying for the moral state of the Mamiya household, their neighbor Nanae comes over to talk. She is powerless to resist his powers of hypnotism, and their other neighbor, Yachiyo, later shares the same fate. Finally Ruiko, President of the Neighborhood Association, approaches the Mamiyas house