Hikari, a married woman dissatisfied with sex with her husband, one day cheats on him with a man she met on a matchmaking app. Hikari experiences vaginal orgasm for the first time as her vagina walls are torn by the man's giant penis, and she becomes intoxicated with the pleasure of internal ejaculation. Several days later, during dinner, the cheating man barges into her home with his delinquent friends. The men knock out her husband and use electric massagers and vibrators to make Hikari orgasm repeatedly. They further engage in a threesome, relentlessly penetrating her deepest vaginal recesses. Hikari herself goes mad with vaginal orgasms.
