Hidetoshi's son, who is a ronin, is a mother's boy who has feelings for his kind and family-minded mother, Kaori. One day, Kaori went out on a rare occasion, and when she was wondering why, she said that she had gone to the gym. However, when Hidetoshi sees her secretly on the phone, he suspects Kaori, and when he secretly follows her, he witnesses Kaori disappearing into a young man's house. "Her mother is a liar!" Hidetoshi unintentionally pushes Kaori, who is about to go out again without knowing anything.
