Seo-jun, a young pianist from an underprivileged background, manages to study classical piano with the aid of a scholarship with the help of renowned pianist Eun-jung Son. His goal is to win an international competition but he is repeatedly defeated by his rival, Min-jae. After failing to win, out of frustration, he vandalizes in the waiting room. Ji-soo witnesses his misdemeanor and blackmails him to manipulate him. Seo-jun and Jisoo develop a romantic relationship and he finds out that she plays jazz piano. He became passionate about jazz piano as well, performing in jazz clubs, and distracted from classical piano. Eun-jung discovers his behavior and disapproves of it, and thus considers cutting the scholarship off him. Seo-jun gets one last chance to compete in a competition before his military enlistment but learns that Min-jae is also participating. Can Seo-jun prove his worth and forge his path as a pianist?
Based on Lim Solah's novel of the same title, Snowball focuses on the friendship between three girls who are united by frustration with the mundane routine of high school life and its associated authority figures, only for their bond to be severed by otherwise different natures.
Han Sung Min is a model and actress under ESteem Entertainment. She made her debut as a model in 2016 but entered the entertainment industry in 2017. She appeared in Park Hyo Shin's 'The Other Day' and DAVICHI's 'Days without you' music videos. She also has a VLOG-style drama where she shares her daily life through video and interacts with subscribers and creates a story together, called '마의 19세' (My nineteens).