I read novel until ch. 19, with is almost the end (it has 20 chs + extra) and so far this is not yaoi at all, neither romance. The main characters do have feelings for each other but it's very conflicted and they have no romantic interactions at all lol they do have teasing moments and all, but the main focus of the story is social hierarchy and surviving through your teens/highschool years. I'm just leaving this comment here so you guys don't expect something else. The novel is really long and the manhwa will take a long time to get there, so do not expect romance nor sex scenes. I'm almost at the end and they just kissed once on ch. 18 and it was a MESS lol mc has a love/hate relationship for ml and it isn't really that simple. To be honest they don't really make a good pair cuz their relationship wold be toxic as fuck, ml has his problems but mc is CRAZYYyyy.
I do recommend reading the novel from the beginning cuz it's really well written and much more interesting than the manhwa! A good story, but do not go expecting focus on romance nor +18 scenes. If something does happen it will be at the very end, I will comeback to update once I finish reading it.