My mother lied.

Hidetoshi, the son of a ronin junior high school student, is a mother boy who has feelings for his kind and family-oriented mother, Kaori. One day, I was wondering why Kaori went out for a while, and for some reason she started going to the gym. However, Hidetoshi becomes suspicious of Kaori when he sees her secretly talking on the phone, and when he secretly follows her, he witnesses Kaori disappearing into a young man's house. ``Mom's a liar!'' And when Kaori tries to go out again without knowing anything, Hidetoshi pushes her down...