Yoon Tae Oh (Choi Min Ho) is 20-years-old and a freshman in college. He has a freewheeling personality. Tae Oh has been friends with Han Song Yi (Park So Dam) since they were little. Now, he begins to have feelings for Song Yi. She has a bright and positive personality. Meanwhile, Tae Oh has a friend, Seo Ji Ahn (Kim Min Jae), who is well-behaved and exemplary. A love triangle brews between these three people.