This first chapter kinda feels like it's rushing to introduce the premise. If you think of it as an actual situation it'd be quite unbelievable
How so? I agree that the chapter was too short, but nothing seems too outlandish to happen in real life. I mean, it does seem silly for them to bully the loner girl like that over just drawing manga, but high schoolers can be jerks like that. Plus it seemed that she was already unpopular before this happened.
Yeah, the premise is believable, it's the situation itself that I find ridiculous. Their reaction would only make sense if they were already bullying her, but then it's silly that the other girl only makes it clear that she doesn't like that for the first time. Or that she only notices MC at that time. Maybe if Nikaido was a transfer student that would make sense but this just feels like an exposition