Oh my god thank you for yapping permission!
I think first of all, he's on the college basketball team, captain of the team. And that's how your first met him, at a basketball game held at your college and you can't help but admire his broad shoulders and muscly arms, his strong thighs and the way he moves around the court
Cut to your friend inviting you to the frat party and that's when he sees you, he saw you oggling him the entire game and he knows now is the time to make his move
I agree that he says something stupid and cheesy as a pickup line, but hey it works.
Fast forward and you two aren't anything official but you are officially fuck buddies
Seungcheol likes to have a quick fuck with you in the locker room showers before a game, says it gives him good luck
He adores seeing you walking around in his hoodies even if you've just woken up and your eyes are crusty and your hair is a mess
He eventually asks you to come to homecoming with him and you both decide then that it's official
He also fucks you HARD cause we know Cheollie is packing!
I'm a big fan of the theory that Seungcheol loves cowgirl, he gets to have his hands roam all over you and watch your tits bounce, sometimes he pulls you closer to him so he can suck on your nipples while you rock your hips into him so good. He usually helps too, one hand on your hip and the other rubbing your clit
That's all I got, sorry it's mostly fluff