fire and ice
au where superheroes and villains exist.
your normal superheroes who save the world from evils and are loved by everyone. of course, they have their secret identity. they don't want to be mobbed by fangirls at school.
insert: red velvet
they contrast your goody goody superheroes. overrun with evil, they break the law and go against the rules. like the superheroes, they have their own identities. sure they were villains, but they should be allowed to go to school also without being mobbed.
the groups collide, head on. they were rivals, enemies. bts hated red velvet, red velvet hated bts. both promised to the destroy the other one day. but what happens when a pinch of love is added to the mix of fire and ice?