All Yeonwoo wanted was to befriend the cute underclassman sitting next to him in class. But when his friendly gesture is met with an icy glare, he's left baffled. Things only get worse: elevator doors slammed in his face, sticky notes slapped on his back… What is this, elementary school?! Fed up with the childish pranks, Yeonwoo decides he’s had enough. But just as tensions peak - bam! They're assigned to the same group project. And in the middle of Yeonwoo’s fury...he suddenly bursts into tears?! What does this kid have against Yeonwoo, and what will Yeonwoo have to do to make things right?