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.