Saimin Gakuen follows the dark revenge of Domyoji Kosei (also referred to as Yukimasa or Akira in some translations), a bullied student who obtains a mysterious hypnosis app that lets him control the bodies of others while their minds remain fully aware. His primary targets are the haughty ojou-sama Aiba Ryuuka, who has constantly mocked him, her childhood friend Suzune who follows Ryuuka’s lead, and the cold, self-preserving teacher Miyako who ignored his suffering.

Using the app, Kosei forces the girls into public humiliation, involuntary acts, and intense sexual torment. Ryuuka desperately tries to resist with her strong spirit, but the relentless creampies, public exposure, paizuri, and mind-breaking combos gradually shatter her pride. Suzune struggles between her gentle nature and the forced acts, while the virgin teacher Miyako is dragged into the spiral of shame. The story builds to a climax of bathhouse lesbian play interrupted by brutal intrusion, ending in complete moral and physical collapse. Full of mind control, exhibitionism, forced urination, belly bulging, and intense humiliation, this PoRO title delivers heavy erotic despair and revenge fantasy.