A sexy mission is issued to the noble investigator Ichika! This was supposed to be the same mission as any other for this battle-hardened girl... After a fierce battle, Ichika is captured. Her body is already tied up with rope and she can't move. From there, the pleasure aphrodisiac training begins! In the den of eroticism, she sobs, screams, and climaxes! A purgatory of torture so intense that she can't focus her eyes! Although she resists, the rough rope that digs into her body every time she reacts gradually melts her reason... Will she fall into a pleasure urinal?