A belief that "If we write our crush's name on an eraser, our love will be reciprocated" creates chaos when Atom, a faint-hearted high school boy borrows an eraser from Mudmee, his girl classmate whom he has a crush on, and finds that she has secretly written the name of the handsome basketball player Kongthap. Things get even more complicated when Kongthap accidentally sees Atom carrying the eraser with his name on it, causing him to misunderstand that Atom likes him.