A happy couple who have been married for four years. They are living frugally in order to buy their dream home. Then, an opportunity for the husband to get promoted comes up. The husband is put in charge of a project, and in order to boost the morale of his subordinates, he invites them to his home to entertain them. This is the beginning of a master-slave relationship between the husband's subordinate and his wife, Yuna... She has sex with him next to her drunken husband. The subordinate trains her by making her cum with toys. Then, right in front of her husband, she cums like crazy on another man's dick in a cuckold threesome. The chaste wife, who goes crazy with pleasure from being violated, is reduced to a perverted wife...