The bookstore owner, Hyun, coincidentally discovers the diary he used during high school. As he flips through its pages, he reminisces about the past when he had a one-sided crush on his close friend Dongho.
One night, which seemed no different from usual, Hyun coincidentally overhears Dongho mentioning that he has someone he likes.
Hyun continues to suppress his feelings for Dongho. Meanwhile, Dongho, wearing a meaningful expression, comes to meet Hyun.
