Do you remember anything else per chance ? Maybe I could figure out which one u mean if you remember some more details ^^
No unfortunately. I think I only read the first two chapters, so the details are desolate. MC was definitely an idol, part of a popular group, but I think he might have been the least popular of the group? He had black hair. The ML has something to do with gaming, but I'm not sure if he's an e-sports player, retired and livestreaming, or just a skills-type livestreamer.
MC is streaming himself playing a game when he happens to queue with the ML. Iirc, the MC was really bad.
Sorry, that's really all I can remember.
Nevermind, I found it. It was from a novel.
https://www.novelupdates.com/series/unstoppable-troll/
The prob is I can't remember if this was a novel I read or a webcomic, but I'm leaning more towards the latter. BL, Korean, MC is a popular(?) idol. He's livestreaming himself playing a game when he runs into the seme. The seme is either a livestreamer too or an e-sports player. They become a duo of sorts.
I'm pretty sure this all happened in the first two chapters as it was ongoing and had just started when I picked it up.