Dong-geon says that he works as a designated driver not because he has no money, but to gain various experiences. In fact, it is because of his memories with Seo-ra in the past. Meanwhile, Seo-ra is doing whatever she can to pay her younger brother for an accident. Seo-ra’s friend, Jin-hee, says there is a way to make a lot of money for her while serving as a chauffeur. Seo-ra falls for Jin-hee’s twist and she runs into Dong-geon. Dong-geon feels his rational feelings for Seo-ra… Seo-ra continues to act as an obscene agent to earn her money, and she ends up having a bad breakup with Dong-geon.