The man had dedicated his life to his career, rising to become a company president, with no interest in romance or relationships. But for the first time, he falls deeply in love and discovers what it means to truly care for someone. However, the woman harbors sadistic desires and presents him with an extreme ultimatum: "If you wish to spend your life with me, surrender all your wealth, become a man who fulfills my desires, wear diapers, abstain from sex for life, and allow me to control your ejaculation." Driven by his love and desire to be with her forever, he accepts her conditions. He hands over his entire fortune, and she uses it to purchase a luxurious mansion. Now penniless and imprisoned within the estate, unable to leave, he begins a new life under her rule. What unfolds inside the mansion is a story of absolute submission, domination, and twisted devotion.