Yumin is a young man who has grown up in the countryside. After graduating from college for one year, he is a college student. At the end of the semester, during a vacation, Yumin, a part - time job at a cafe, starts to look at sex gradually as he meets Charlie Brown, who is familiar with urban life. When I got used to urban life, Yumin received a bunch of letters from Sookmyung who had forgotten from my mother, but I got away from her as she learned about her youthful college student Nana who was practicing at a university in an accident. In the meantime, when Charlie felt his relative alienation and asked him to come back to his innermost appearance, he disappeared. After accepting Charlie's advice, he broke up with Nana and went to visit her.