A Forgotten Frolic

Yeonwoo's attempt to befriend a cute underclassman sitting next to him in class is met with an icy glare, leaving him baffled. The situation escalates as he becomes the target of childish pranks, including elevator doors slammed in his face and sticky notes slapped on his back. Fed up, Yeonwoo decides he's had enough, but things take an unexpected turn when they're assigned to the same group project. As tensions peak, Yeonwoo's emotions suddenly get the better of him, and he bursts into tears. What drove the underclassman to behave this way, and what will Yeonwoo have to do to make amends and resolve their conflict?