That's actually quite far from what will happen. Believe it or not but the seme is really loyal.
U know some spoiler?
Wait... so he is loyal to his f-bud? I thought he didn't like him and only liked his chemistry.
Yups haha. I mean, at least until the 2nd season. S3 is still ongoing, but I promise you won't be disappointed with the seme. He's quite stubborn about his feelings but that's it. No major fight/misunderstanding or whatever.
So at the end ... Kuho will learn about what a true "relationship" is all about, or is seme going to date someone else and they will end their fwb situation?