It had all started innocently enough, as most things do when you're young and foolish. Kindergarten art class was where the rivalry was born. You had been drawing something—you can’t even remember what now, maybe a tree or a house, some basic kid stuff. And then there he was, this little menace, with his grubby crayon, leaning over and scribbling all over your masterpiece with a wild grin on his face.

That was it. That was the spark. From that moment, you knew, Heeseung was your mortal enemy. Even if at the time you didn’t really know what the word meant.

Fast forward to high school, and nothing had changed between you two—if anything, the animosity had only gotten worse. Heeseung had transformed into the epitome of "guy you can’t stand," with his cocky attitude, perfect hair, and that stupid, arrogant smirk that was permanently plastered across his face. The guy had somehow become the most popular kid in school, the heartthrob that everyone seemed to be obsessed with. Captain of the basketball team, top scorer on every test, and, of course, the reigning king of casual flings. He cycled through girlfriends faster than you could blink, always moving on to the next pretty facewithout so much as a second thought.

That’s what irritated you most about him—no, not the girlfriends thing, you didn’t care about that, but the fact that he seemed to get everything so damn easily. Heeseung didn’t have to work for it. He had brains, looks, athletic talent, and popularity, and it pissed you off because you knew, deep down, he was smart. He worked hard when he wanted to, just not in the way you did. Heeseung wasn’t satisfied with being just good enough; he had to be the best at everything, especially if it meant beating you at it.

The competition between you two was constant. Math class felt like a war zone, with both of you racing to finish equations faster than the other. Gym class was no better either—every drill, every game turned into a showdown. It was never just about excelling; it was about outdoing him.