Nana, who works for a major railway company, participates in anti-molestation operations by acting as bait to catch perpetrators. One day, she apprehends a molester who carelessly approaches her and meets a young man named Kazuo, who is called as a witness at the scene. Moved by his strong sense of justice, she feels stirred inside—until he says, "I like molesters too..." Days later, she runs into Kazuo by chance during her commute. Suddenly, he starts groping her groin. Though initially shocked, Nana gradually feels her body and emotions responding to the unexpected act. This moment of inner conflict marks the beginning of a new series of events.