beta
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.