Jia, a high schooler, develops a deep crush on Sunoo during their memorable school trip, where they become inseparable friends. Just as Jia's feelings blossom, Sunoo heartbreakingly confesses he's smitten with Jia's best friend instead. Stunned and disheartened, Jia faces the challenge of navigating her emotions and their evolving friendship, unsure of what the future holds.