Shimazaki Mayu, an aspiring office lady, moves to Tokyo and visits a rental apartment for viewing. The real estate agent aggressively pushes her to participate in a "trial stay campaign," forcing her into an overnight stay despite her hesitation. The property itself is impressive and comfortable, but unable to refuse the agent's persistent invitation, Mayu finds herself caught off guard and drawn into an unexpected experience. As the agent's true intentions begin to surface, Mayu's emotions waver, leading her into a twisted game of bondage, humiliation, and assault under the guise of a housing promotion.