It could be that because he’s so high functioning that the diagnosis can’t be clear - it’s a spectrum and it’s hard to pinpoint for some who can mask , that’s what happened to my sister it took like 2 teat to confirm it because she’s high functioning and can “fake” being “normal” as she’s done it all her life up to the diagnosis
Very true, but I think Sangwoo's doctor was on crack that day, cuz bro is incapable of being anything but exactly who he is, and that is a guy who is clearly autistic. Like I bet you could use the DMS-5 to diagnose him based solely on interactions from the manhwa. He's more autistic than my diagnosed autistic child.

doesnt sangwoo say in the beginning that he wasn’t diagnosed on the spectrum. mf the whole side stories is proof enuff