How about a thriller/slasher/serial killer where the killer; I'll call them "bubblegum killer" because they left bubblegum wrapper after they unalived their victims; is one of the friend in the friend group (inspired from Psycho by @brosvt) and they framed the other friend who chew bubblegum all the time while the inspiration of the killer is when the innocent friend one day offered them a bubblegum and they accidentally left the wrapper and they kinda like the concept?
Hey
I'm starting to move my stories to ao3 because the stories is better there I did some proofread but I'll still post them here but I will be updating more on ao3