Sansha Mendan: Rensa Suru Chijoku Choukyou no Gakuen follows the sadistic transfer student Ryou as he exploits a twisted fate at his new school. Recognizing Aina, the cheerful twin sister of Yuuna—the teacher he previously broke and whose scandal was hushed up—he reignites his domination. Blindfolding and forcing Yuuna to service him in front of the unaware Aina, Ryou revels in the sisters' shared degradation. Aina's fierce resistance only fuels his desire, leading to intense sessions of brush teasing, binding, and penetration that erode her willpower. The chain of shame extends to the haughty student council president Marika, who schemes in vain to stop him, only to be ensnared alongside her elegant mother, the school principal. Through blackmail, tight bondage, relentless stimulation, and public exposure, these proud women are reduced to obedient, climaxing vessels for Ryou's lust. Produced by PoRO from BISHOP's hit game, this series delivers thick, detailed scenes of teacher-student corruption, twin shame, and mother-daughter depravity in a school of unending training and humiliation.

Based on the erotic game by Bishop.