Eun-Seo Lee and Si-Hwa Kang have been friends all their lives. One day, Eun-Seo shatters their comfortable relationship by asking Si-Hwa out, and Si-Hwa moves away soon afterward. Eun-Seo tries her best to forget him until they meet in a college class six years later. He seems to know about her unrequited love for him, and to make matters worse, he moves in with her family after running away from his hostile home environment. Can Eun-Seo cope with his sudden reappearance in her life? And is it possible that Si-Hwa loves her back?

(Source: WEBTOONS, edited)