The words "This is all your fault" echo in the ears of Yuma, a capable office lady. After committing an irreversible mistake, she is forced to pay a harsh price. Her days now consist of late-night office sessions, where she is compelled to perform sexual relief duties and carnal hospitality for male coworkers. Trapped in a situation where even resigning is forbidden, she continues to endure physical intimacy with men she does not love. Enduring sadistic treatment from her superiors, Yuma forces herself to moan sweetly against her will. In this unbearable situation, her body and mind gradually succumb, becoming more obedient as they are slowly consumed by the torment.