Young K seems uninterested though since their last encounter and I'm sure he's done with her forever. He realizes she still has feelings for Young K and he'll never be able to date her. Wonpil doing aegyo and Jae being extra af :joy: Everyone's cheering, Sungjin looks at the girl but then notices that she's not looking at him but at Young K. So we're at the basketball game and they're all having fun which is adorable. Basically he's done with all this lovey dovey crap :joy.
Sungjin is struck in love :joy: Again Wonpil notices and I guess he thinks Sungjin is hopeless for liking her cause it'll never happen? I have a feeling he knows something that has to do with the girl and Young K but won't tell Sungjin because it's not his business. It affected Young K which is why he looks at her annoyed whereas the girl still wants to be friends. My conclusion is that they had some history and they used to date but they broke up for some reason. If you pay attention the girl seems to mouth "Brian" before Young K leaves. Young K bumps shoulders with the girl protagonist and kinda glares at her. To me Wonpil seems like the guy behind the scenes that notices everything going on around him but doesn't get involved :joy: Also he looks absolutely adorable in that gif. Meanwhile in the library, Sungjin spots 'the girl' and develops a crush on her. His concept seems to be the quiet, cold but popular guy that is always surrounded by his fangirls but is uninterested in dating :joy: the scene where he rejects the girl's gift on the rooftop is proof of his 'character'. Dowoon gets up and leaves too because of the noise.
The next scene shows the classroom where Young K Brian is sitting down and has a little quarrel with the girls in his class. A girl runs and jumps on him, my guess is that they're best friends since throughout the video they have a close playful relationship. The mv starts with Jae walking to school while reading some paper.