This is the story of a naive young man, Keiichi, who’s big fat cock serves as a magnet to the sadistic but gorgeous hentai slut named Reika. Where the later would do anything to make his rock-hard boner exclusively hers by setting up Keiichi and blackmailing him until he submits to her will. Taking pictures of him and using Tomo Aihara’s bathing suit to masturbate, and threatening to tell his mom and Akane, Keiichi’s got no choice but to bend to Reika’s sadistic sexual methods and becoming her personal sex slave.