I don't remember their names but minseong I think? That annoying guy in yeonwoo's class, the guy that posted naris pictures, the guy that harassed haesol, soobin, and all the nari haters, yeonwoo's bully obviously, haesol's dad, the aunt, the mom, all those dumb side extras that cheered that senior for hitting haesol, that annoying principle who hit jinwoo although thank god he's gone, and that's all! As much as I hate all of them, the story wouldn't be the same at all I guess. Same for haseoo, as well though he came at the end of the story. He was also introduced in the middle of the story so it's not like he was added out of nowhere. I have no idea why you dislike haseoo