Satoru, the fiancé of Yumi Kazama, the third daughter of the Kazama family, begins living with them due to unforeseen circumstances. Entering a household of women, he remains innocently unaware, like a lamb among wolves, completely ignorant that Yumi's two older sisters are insatiable perverts. Gradually, he gets drawn into their world. The story unfolds with passionate love-making scenes between Yumi and Satoru, lesbian encounters between the sisters, and intense lovemaking that borders on seduction. One day, a serious crisis erupts in the lust-filled Kazama household. "What?! This house is being used as collateral for debt?!" the three sisters panic. What desperate measures will they take to save themselves?