The play is adapted from the webtoon of the same name, which tells the story of an ordinary woman who prioritizes protecting herself and a man who believes that protecting love is a romantic comedy about protecting himself.　　Shin Hyun-bin plays Ha Yoon-seo, who will never lose his self-confidence with his ability to do so anytime and anywhere, a character who is beautiful and has a good personality and can make money at work, but cannot fall in love, and is the section chief of the brand marketing team of a credit card company.　　Moon Sang-min plays Seo Joo-won, who has a gentle personality and has a good look, figure, wealth, and although he is a new employee of Ha Yoon-seo's group, his mother is actually the chairman of the company and a clerk wearing the mask of Chaebol III