Classmates in High School but complete strangers, Youra has had a crush on the quiet boy but was far too nervous to physically speak to him. So instead, in order to talk to him, she starts writing him letters and leaves them in his locker. Overtime this develops to feeling more like "online friends", but Seungmin was increasingly more curious about the mystery girl. Who would have thought that she'd be in many places that he least expected... COMPLETED: ??/??/????