A killing game is when you have 16 Students with unique talents -also known as Ultimates or SHSL- in one area with no exits and force them to kill each other. When it inevitably happens, a
monochromatic bear forces you to investigate the crime scene, interrogate your best friend, and participate in a class trial. There, you figure out who is the blackened who committed the crime and
condem them to an execution which is weird and fucked up. This goes on for five chapters then the sixth is for figuring out the mastermind of the killing game where you figure out that it's been
Junko Enoshima all along.