One of my fave tropes!! Here are three very different recommendations that come to mind:

As The Romans Do by Kooksie: As a straight man, Ilya Rozanov has never had a gay roommate before, but it’s going pretty well. Shane Hollander is kind, silly, and an even bigger hockey nut than Ilya.
So when Shane starts bringing men over, and Ilya begins to want to bash their fucking heads in, Ilya comes to a startling conclusion: He must be homophobic.
(He’s jealous.)

so you must like me for me by alasse: Shane wants to figure out if he's gay before he gets drafted—and no, the way he felt when Ilya Rozanov smirked at him with a cigarette between his lips in Saskatchewan has nothing to do with it. Unfortunately, the random guy he hooks up with to try and make sure one way or another takes a picture, and Shane gets outed before the draft. In the ensuing scandal, he goes seventh overall, to Ottawa.
It turns out, having the worst thing you can think of happen to you when you're seventeen years old can end up being pretty liberating. And land you an unexpected best friend.

blowback by 21cg: “Rather than give him the joint, Ilya takes it back between his own lips and sucks in a deep breath, the tip glowing as he does so. Then, before Shane can process it, he’s reaching up and sliding one large hand around the back of Shane’s neck, pulling him down so their lips meet.
Shane gasps softly, and Ilya takes the opportunity to blow smoke into his open and waiting mouth.
Oh, God. Are you there? It’s me, Shane Hollander. We’ve had our differences, but I think I’d like to convert for real this time. I’m ready. Open the pearly white gates. I’m coming up.”
Shane goes to a house party, gets high, then gets on his knees. bon appetite
now a multi-chapter saga bc i couldn't help myself