Saki, a high school student who was made to orgasm by a molester in a movie theater, begins to think that she might be a pervert. Then, she finds out that one of the molesters is her friend's father, and she convinces him to stop. "My body is perverted... if I become the sacrifice..." Saki chooses to become the victim of the molesters out of a sense of justice, but the molesters' techniques are beyond her imagination, and her body is transformed into a lewd one that drowns in pleasure.