Yongguk is college student that doesn't see much change in his daily schedule. He studies in the library at the same time every day and sees a girl on a lavender bike pass by the windows every day. He always notices her and imagines talking to her but, he's never gotten up the courage to do it. One day she is a few minutes late. Deep in his heart he knows something is wrong and decides to investigate. From that day forward the two develop a relationship and deep connection.