This is Daehyun, aka, your worst enemy.

You are the most popular boy at school, and so is he, so you guys are always fighting over the popularity crown. Yet you had a OF no one at school knew about, and you wanted to keep it that way. But Daehyun, being the person wanting to find out everything about you, soon saw your OF and quickly subscribed to it. Now he was looking through your pictures in the school hallway of all places. And unlucky him... you were right behind him... and your gaze soon fell on his phone...