Ok so here's the AU. When a victim is killed and the the blackened is executed, both (now deceased from danganronpa) will awake in a hospital (or so we want them to think). Its an all white room with nothing but two hospital beds. They would awaken, and in order to be able to go back to danganronpa to see their friends again, the have to escape. When they exit the room they do not find a hospital, rather an old rustic house. But its huge. 5 floors, 10 rooms on each floor, and 14 cells in the basement. In the center of the place there is a clock, and when it runs out, they have to die.but if they escape first, its back to the real world to await the survivors of danganronpa's return.
I hope you like this!!-Authorchan❤🌠