The Kinoshita couple run a convenience store. The husband is always working, while the wife, Rinko, lives a cold, lonely life... One day, she is ordered by a bully to catch a boy shoplifting at the store! She questions him in the back room, but the boy is so timid that he just shows his Kokoro. Before she knows it, Rinko's sadistic side begins to grow. And as "compensation for shoplifting," Rinko devours the young, innocent cock and takes his virginity, but she is unable to suppress her unconscious sadistic tendencies...