"Mother-in-law, your breasts are bigger than your daughter's... I've been looking at them for ages..." The man was supposed to have married his wife out of love, but the moment he saw his wife's mother, he felt envious and fascinated by her large breasts, which his wife did not have. Then, one day, their relationship changed from that of father and son to that of man and woman. Even though their families were close, the sense of immorality spiced up their relationship, and the story of eight families in which they deceived their true partners and fell into the depths of carnal desire.