year 2026, the goverment decided to put on an experiment, they closed 10.000 high schoolers in a closed facility with monsters that only come out at DAY. The kids separated into 4 different fractions: Junkers (street laws), Sterica (wannabe military), Starlords (knights), and finally, Reptars (fishers, live only close to water). There's also a small fraction that's not in any of those. Couriers. And you so happen to go to fraction school...