Her husband, who is older than her, has a dull life at night, and his wife, Reiko, is living a life of frustration. Even though he is her son, he is her stepchild and a complete stranger. In front of a young man, her mother-in-law Reiko's desire could no longer be suppressed. Her stepmother's sexual desire goes out of control, and she even touches her son's friends. Her mother-in-law, who is dominated by her tremendous sexual desire and has lost her sense of morality, continues to seek her pussy, ignoring her incest.