I know it's a given they won't exactly follow the webtoon but as an avid webtoon reader (i didn't quite like some parts of it they became too bleak for me) i have to say that I can bat an eye for some parts but I don't like how seojun is completely neglected because they dated for roughly a year and she didn't even date suho in the webtoon what I'm interested in is seeing how she progresses because the whole thing is supposed to be about self love and acceptance and I'm not so sure they really convey that...overall I highly recommend you watch this show and maybe take a look at the webtoon if you're interested!