Masato Shimamura, a tutor, finds himself dealing with his troublesome childhood friend, Shinjo Haruna, and her perverted sister, Shinji Serina. Haruna may seem beautiful on the outside, but she hides a horrible personality, while Serina is a selfish schoolgirl with an attractive body. These two become a constant source of torment in Masato’s life. One day, Masato crosses paths with Sakiko Ichinose, the owner of the exclusive club “Gentildonna.” She offers him a hypnosis device that claims to give him control over people’s minds and bodies. Seeking revenge against the Shinjo sisters, Masato decides to put the device to the test. He starts by using it on Serina, and the effects are far more potent than he expected. Serina becomes completely submissive to his every command, becoming a vessel for Masato’s release of pent-up desires. With his newfound power, he orders Serina to target her sister, Haruna, as the next target.