I don't get the hair thing. I actually love that silver hair with bangs, the mullet is not my fave but it's not horrible, the rest have normal hair. Mhm...
I just think sooheon has gone through way too much, so they better give us some kind of plot twist where he does…
Well, there can always be a plot twist and the surgery is possible but with huge risk. And... Honestly, we can't be sure if he is the truly good guy, yet.