To protect her lover from a gang of delinquents, Risa becomes a scapegoat and is forced to ingest a dangerous aphrodisiac. The drug's effects surpass imagination, pitting her body's overwhelming pleasure against her desperate will to resist. An innocent honor student, ensnared in a cunning trap set by a justice-driven schoolgirl, becomes horrifyingly possessed by the aphrodisiac's power. Losing all rationality and slipping into a trance-like state, she is swallowed by a whirlpool of ecstasy, transforming completely into a sexual plaything. The dramatic progression—her intense psychological struggle and the shattering of her pure heart—forms the core appeal of this story.