my memory is fuzzy on this one but I remember a manga where this girl keeps teasing/bullying her childhood best friend... I recall the mc being extremely obnoxious and overly touchy and pretty much never reflected on her actions T T The series was pretty fanservicey. I believe there was some school trip at some point. There was also a girl who's liked the mc and blackmails or goes yandere on her but it resolves and nothing ends up happening? There might have been a side couple but can't remember. The main thing I remember was there was a sequel chapter where they were living tgt as adults and the artist had improved significantly and the art was a lot more detailed
