With her busy husband often away from home, Rie (Nana Ayano), who is in the prime of her life, begins to direct her pent-up lust towards her father-in-law, Shigefumi. At home, Rie teases him by wearing a tight jacket and a miniskirt, and finally, she seduces him and the lust that had been building up to the limit explodes... The sense of immorality of being violated by her husband's father-in-law stimulates her brain even more, and she is engulfed in a whirlpool of pleasure and climaxes that she has never experienced before, which is completely different from her husband's sex, and the love triangle in the home escalates...