I decided to give in and take a crack at this. I'm still confused about what's going on with this contest, but I thought I would just upload what I had,
I thought about BTS' roots and their name and came up with a dystopian parallel universe story.
https://www.webnovel.com/book/13694544305844805/Blood-Power
The world is separated into classes determined by blood types. This world is ruled by a totalitarian government intent on keeping the classes separated and the superior blood type in power for a dark reason.
All oppressive rulers have their resistors. The best hope for resistance this world has is a group of seven boys known as the 'Bulletproof Boy Scouts'.
Good luck to everyone entering and I hope we get some more information about what's going on with this competition.