A couple reaches the peak of happiness upon conceiving a child. However, in the wife's room during her maternity leave, a diary reveals the cruel truth behind her pregnancy. Airi starts working in a lingerie development department, placed under a theoretical yet eccentric boss who subjects her to relentless power harassment and sexual abuse. Under the guise of training, she is forcibly taken, lured into becoming a model for seduction, and compelled to engage in real-life practices. After enduring repeated creampie experiences, Airi's mind gradually unravels—what awaits her at the end of this descent?