Kyungsoo’s steady life has been turned upside down when the university’s playboy starts having interest in him. He finally makes him promise to leave him alone, in exchange of spending a night with him. And after that night, “it will be like you have never met me.” And that’s what happens. But Kyungsoo is convinced that Jongin hasn’t disappeared because of him. Rather, something bad has happened to him. Even his friends, Minseok and Jongdae think that something’s wrong.

Meanwhile, Daehyun agrees to start dating Baekhyun, even though he likes his best friend, Youngjae. And Baekhyun is going out with him only because Kyungsoo for being single. In addition, he stuck with volunteer work because he parked illegally. And on top of that, he actually starts to like the officer who caught him.