Gang SebasDion

title basically says everything, so here are the AUs i'll be using:

Gang - Sebb is the heads boyfriend and Dion is a member who treats him better
murder mystery - they are both suspects
joker + (male) harley quinn - i saw their halloween photo and just had to
high school - Sebb is popular, Dion is a shy guy
soulmates - no au list is complete without this
opposites - Sebb is the ultimate sweetie Dion is the ultimate bad boy
and finally....
musical - who doesn't want those two to sing a duet?