Siblings Seong Ryu and Bin Ryu have always been in the spotlight with their good looks, magnetic charms, and diverse talents. However, Bin has a secret, which involves the quiet valedictorian Yeong-in Jeong. Seong, who also secretly harbors an inferiority complex toward Bin, begins to approach Yeong-in. The three characters must face their complicated family history and encounter emotions they've never experienced before on their journey to adulthood.