Nao and her husband, Satoshi, work in the same company, even in the same department. Nao became the top employee of the month, while her husband always ranked at the bottom. Department head Ozawa has always had his eyes on Nao, feeling jealous that someone like Satoshi could have such a beautiful wife. Then the opportunity came when Ozawa was assigned a new task by his superior, and he delegated his current work to Nao. Under the guise of easily supporting Nao, he moved her workstation into his office. He intended to pressure Nao by threatening to fire Satoshi, leading her to agree to wear provocative clothing when meeting clients. After a few instances, he could not resist anymore and took advantage of Nao. The pleasure Ozawa brought to Nao made her gradually stop resisting and even actively became his mistress, lying to her husband to meet and have sex with him...