Mitsuko and her husband and daughter moved into her husband's family home. She had no idea what kind of life awaited her in her new house and new family. She drove her own husband's father crazy with her beautiful body. Gradually the charming daughter-in-law turns into a slave of lust and old age. What would happen to her if her husband finds out about her adventures, and whether she can stop the forbidden relationship. Maybe we can find out in the last four episodes.