Transgender idol Serina Tachibana finds herself thrust into a life of slavery. Once beloved for her cute appearance and gentle personality, she is suddenly captured by a shadowy organization and put up for auction as a sex slave. At the auction, she is forced into humiliating acts in front of a crowd of men, her shyness exploited as she's made to perform against her will. Though her mind resists, her body betrays her, her large breasts trembling as arousal takes hold. The onlookers grow frenzied, and despite herself, she climaxes repeatedly, drenched in cum. From this day forward, her training as a submissive sex slave begins, marking a complete transformation in her life.