My Love Mix-Up! Season 1 Episode 1

Atom borrows an eraser from Mudmee, his girl classmate whom he has a crush on, and finds that she has secretly written the name of Kongthap. Kongthap sees the eraser with his name on it in Atom's hand and mistakenly thinks that Atom has a secret crush on him. In order to keep Mudmee's secret, Atom remains silent.