After failing his college entrance exams, Takeshi is forced to live with his older brother and his wife as a ronin. Living under the same roof as Kana, he develops intense feelings for her. Unaware of his emotions—or perhaps fully aware—Kana continuously tempts Takeshi with her sexy looks and voice. Yet, each time, the seduction stops just short of fulfillment. Kana's true desire lies in the nightly acts performed in her marital bedroom. She lures Takeshi with a chilling invitation: "We'll have sex while my husband sleeps right beside us. I'll be waiting for you in the bedroom tonight..." Behind her words lies a calculated plan to shake Takeshi to his core.