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…

Yuuichi Mamiya uses a penlight’s powerful hypnotic properties on his loving mother-in-law and younger sisters-in-law, amplifying their sexual desire. However news of the things that happen in the Mamiya household starts making trouble in the neighborhood. The president of the neighborhood association comes to talk with the Mamiyas, but she soon falls to Yuuichi’s hypnosis. Rumors about the Mamiya household spread throughout town, and Yuuichi is forced to take drastic measures.