Sumire Shirakawa, a student who believes herself to be sexually frigid, is shocked when a molestation incident on a crowded train triggers an unexpected and overwhelming physical response. After seeking help from her teacher, Kurahashi-sensei, she loses consciousness during a counseling session and plunges into a vivid, erotic nightmare of public humiliation and assault. Upon waking, Sumire is left deeply confused and shaken by the desires revealed in her subconscious.
Araki-sensei uses a mysterious substance to break Sumire's will, forcing the top student to succumb to her hidden desires. To ensure her complete submission, Araki alters her memories, fabricating a fake history where she and her teacher are in a consensual, loving relationship. Trapped in this artificial reality, Sumire is transformed into a devoted puppet, unaware of the truth behind her situation.
After her teacher transfers, Shirakawa is manipulated through hypnotic suggestions and secret orders to expose herself on a train. What begins as a risky command quickly spirals into a nightmare as she is caught by strangers and subjected to a series of degrading acts. Upon waking, Shirakawa hopes the ordeal was merely a dream, only to discover physical evidence that her trauma was all too real.
Sumire Shirakawa endures intense psychological and physical harassment from her classmates, who use blackmail to humiliate her. As she struggles with her own conflicting desires, she drifts between harrowing nightmares of abuse and a seductive fantasy involving her school counselor, Kurahashi-Sensei, only to realize she remains trapped in a cycle of manipulation.