Dangan Ronpa involves a number of new students at an academy for the incredibly gifted being locked up inside the academy with no way of escape, except killing someone and getting away with it. They are given food, but no television or other commodities besides what it takes to live a comfy life. Food, the others for company, some school facilities. When someone dies, everyone has a period to investigate the death. Then a trial is held where everyone pools their evidence to try and find out the culprit. If they find out, only the culprit is killed. If they don't, the culprit gets to leave and everyone else there dies.

I like the whole addition of detective aspects and trial aspects to it. :3 Makes it seem more... refined. Clever. You know?