Alright let me think you could have the bratty girl being the popular one and the other characters envy her a lot like how people hate famous people in real life
you could have the guy whos A bit of a perv start being just that and all the characters find him disgusting but slowly break down...
Hey erm you could do a like high school drama like romance like have like a love triangle or love square they’re messes lots you can do with that or you could have them be best friends then have them get through high school with bully’s and stuff or you could do like a really dark one and go...