A top performer at a major trading company, he enjoys elite status and a happy marriage to Iroha, a beautiful and highly capable colleague. Everything changes when Yano, a talented employee with a troubled past, is transferred from headquarters to the branch. Yano steadily takes over his biggest assignments through sheer ability, then Iroha begins relying on him as well. Before long, the outsider is poised to steal the man's career, honor, and wife—including the forbidden creampie sex she gives him.