Yoo-bi is a wife who is always lonely because of her husband's erectile dysfunction. Her husband is always thinking about what he can do for his wife, so he hires his co-worker to be his wife's sex partner. But as his wife gradually learns of the pleasures of sex with his co-worker, she begins to distance herself from him.

The manager, who is always suspicious of his wife, Ye-in, tells his subordinate to seduce her to test her loyalty. The assistant manager followed the order, but he succeeded in seducing his boss's wife. However, he tells his boss that he failed. The manager regains trust in his wife, but he is completely unaware of what really happened.