Lee Sojin is just a florist handling her shop along with her best friend, Luhan. One day, she begins noticing a customer that frequents her shop. He is a dashing guy that always buy pink carnation or sometimes other flowers that often represented about love. Even during weekends. Unknowingly, her interest towards this stranger grows every single day, just by watching how he smiles at her as she handed him over the fresh flowers. Little by little, she begins to fall for the stranger and she decides to use flowers to state her unrequited love.