A first-year office lady, Yuika Onosaka, is a classy, well-built woman with past beauty pageant experience. Contrary to her pristine appearance, she's a perverted employee who secretly masturbates at work. Before long, she starts seducing her superior—me—and our relationship gradually deepens. She's a highly sensitive masochist with a tendency toward premature excitement. Using sexual training as a form of education, I mold her into an exceptional, obedient office worker. Under my guidance, she transforms completely. I tell her, "Hey, hey, you really want my training? Fine. Come here and stick your ass out. I'm going to shove my cock in and fuck you," marking the beginning of her daily conditioning session.