i also think it's serizawa, from mob psycho 100. i haven't read the manga but it looks like a fan drew it, so maybe it's from a doujinshi or something along those lines, maybe a yaoi one? lol, if it is yaoi, you can try looking on MRM, through the tags for the series ^^
this is from a mob psycho 100 doujinshi that's for sure but unfortunately idk which one. the pairing should be serizawa x reigen
looked through all the seirei djs on mrm but couldn't find any panel like the one op showed ಥ‿ಥ
So it turned out to be a dj that too from an anime I've never watched lmaooo anyways thanks for letting me know guys
I got too excited there mb
https://www.mangago.me/home/album/617332/
I saw this on a yt video thumbnail and have no idea where this is from and I've been going crazy tryna reverse image and ai search, all ik is maybe this character's name might be serizawa cuz one of the comments unders this vid mentioned that