Consider it as a sin to fall for a mortal.

A doll is so beautiful, captivating, perfect. But us humans are not. But she is, she is perfect, fragile as a doll.

  HanKyung and RiIn has been the bestest friends ever since they could remember. But when HanKyung was dumped by his first girlfriend, RiIn tried everything she could do to cheer him up. And she found the solution; sending him love letters, anonymously. Yet he still never acknowledge her as more than a best friend. But RiIn herself, has received a love letter from a man who actually notices her.