On a rainy night, Seo-yu was standing on the Mapo Bridge to die. Unlicensed and underage, Seong-hyeon is surprised to see Seo-yu and had an accident. In order to hide this fact from his brother, Seong-hyeon proposes to lie to his older brother Seong-hoon in return for 3 million won to Seo-yu. However, Seong-hoon does not believe Seo-yu and Seong-hyeon’s words, and in the process of revealing the lie, he falls in love with the charm of Seo-yu , who does not know where to go. Seo Yoo, who has low self-esteem, thinks that there is no way someone like Sung Hoon can like him… “It’s more foolish to think that your sex partner might propose to you…” “how… I thought I didn’t know where I was going. I was in love” Will Seo Yoo be able to be happy with Sung Hoon?