In which chan leaves anonymous letters in Jeongin's locker and the younger is determined to work out who he is. Or Chan is infatuated with Jeongin but just can't bring himself to aproach the cute boy, so he just hides his feelings. That is, until his friends come up with the idea that he could leave letters in his locker with no name. Soon, Jeongin takes an interest in the person behind the letters. Will he find the mystery person or not? Highest ranking: 21- seo 10- chanin