Yeeun has a secret she can’t tell anyone. Her biggest insecurity is that she has severely inverted nipples, and she’s determined never to show her breasts to anyone. However, during a company workshop, she ends up having a one-night stand with Jaemin, a kind and extremely competent lawyer, and the complex she had tried to keep hidden her entire life is exposed. “I can help you overcome that insecurity, Yeeun. And if we get to know each other better in the process, that would be even better.” At Jaemin’s words, offering to help her overcome her complex, Yeeun accepts his proposal, and in the end… she decides to become his sexual partner.