1 part Complete Just when Chaeyoung was going to confess her feelings for her best friend. Jisoo had found a boyfriend by then. With the letter in Chaeyoung's hand, she still gives it to Jisoo, telling her to open it in ten years.
Ten years go by, and Jisoo randomly called her to say she finally read the letter. The night starts with drinking and talking, then ends with drunkenness and new-found loves.