Prologue.

Shuichi Saihara, Ultimate detective.
Kokichi Oma, Ultimate supreme leader.
And Monokuma, the ultimate....pain.

It was Monokuma who managed to lock him and Kokichi in this room in the first place. Probably just to annoy the hell out of him. Or force Kokichi and Shuichi to somehow, work together to escape but that would never happen.