Tsubomi, a quiet, bookish girl dressed in plain clothes, lives a modest life immersed in reading. One day, she is suddenly ejaculated on while riding the train, and later has aphrodisiac oil applied to her body—awakening her sexual curiosity. Though initially disturbed, she gradually begins to experience pleasure due to the drug's effects, and slowly becomes aware of her femininity and burgeoning desire. This molester drama captures her transformation, portraying the evolution of her mind and the emergence of new, intense cravings.