I assume you've seen Monokuma before? It's an instrument of Junko's...and it appeared there. We were forced into a game of mutual killing.

The goal is simple: kill one of our own and pass through the school trial. The one who passed through would get their memories back. All other surviving students would get executed. If we figured out the murder and voted the right person...

They alone got executed. It was all very well done! Motives were presented. More places to get to opened up after each death. [Is it starting to take shape what he did?]