Miki went to her husband's family to congratulate her on her marriage, but to her surprise, her father-in-law, Tadashi, was her former teacher. Surprised and relieved, the two quickly grew closer, and the two generations began living together in a peaceful environment... However, although her husband is a dedicated worker and loves Miki, they have no sexual relations, and she continues to comfort herself alone every night. Tadashi, who himself has an overflowing sexual desire, notices this and approaches Miki, telling her that he is doing it to satisfy her sexual desire...