One day, Hikari, a married woman who is unhappy with the sex she has with her husband, has an affair with a man she meets on a dating app. The man's huge penis gouges the walls of her vagina, and she experiences her first vaginal orgasm, becoming intoxicated with the pleasure of being creampied. A few days later, during dinner, the Hikari breaks into her house with his delinquent friends. The men knock her husband unconscious, and make Hikari orgasm over and over again with an electric massager and a vibrator, and then they violate the depths of her vagina in a threesome. Hikari also goes crazy with her vagina.