Kei enjoys her school life, but under the threats of teachers and taunts from classmates, she is overwhelmed by the desires of men drawn to her voluptuous body. Unable to escape, she is repeatedly penetrated by throbbing male cocks in her mouth and pussy. Awakening to these sensations, she transforms from an innocent girl into a lustful woman, passionately grinding her hips on her own. Her pure school days gradually spiral into a whirlpool of desire.