You're Tsumugi Shirogane's–...no...MasterMind's older Twin Sister, you know everything about the game including the fact that the world outside is in ruins, and have been instructed to defy Monokuma after the announcement of the rules.

After the Killing Games rules are announced, everyone is either shocked or furious. On the other hand, you already knew everything, you have an order to do now, will you go through with it or not?