Protagonist??

16 students trapped in a school, forced to kill. One student is the traitor. Though, I wonder who it is?

Kokichi Ouma, your not so friendly brat of the year. He always lies, always becomes a pain to the ass, and always pushes you off the edge. Everyone hates him except one student in the school.

The Mastermind.

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Wow I'm bored. Just read it. It's Oumasai of course. I haven't watched the whole gameplay of Danganronpa so I'm sorry if some parts are wrong.