Even the strongest feeling can fade . Even the smallest mistakes can be seen . Even the happiest moments end .    Like the story of Choi Jin-ri and Choi Minho .  Choi Jin-ri's world is revolving on Choi Minho's . She did all her best for Choi Minho to notice her.  Until One day , like a wind , she just fade away . Without everybody noticing it . Without a single word from her.    When she left, Minho realized that he should be th