Reiko, the chairman of PA, has a past that has been circled by the bad guys in the neighborhood. The experience was traumatic and eroded Reiko's heart. One day, Reiko pays attention to the behavior of the student organization officers. However, the student organization insider becomes aware of the past that had been circled, and on the contrary, he is threatened to "break the past." Reiko, who was threatened by trauma, has been tossed as a student organization sex slave since then ...