Sammy Hansen and the other students decided to abstain to the killing game, following Xian's last wishes. However, the Monokuma does not consent such decisions and took matters to an extensive way. Will Sammy and the others successfully fulfill their promise of ending the killing game or will Monokuma have his ways?

As Kanon's anger towards Sammy and Kurro grows hotter, a mysterious character appears before everyone, a character capable of unfolding the mysteries of this world, a character carrying all the answers to the question. With the help of someone from the dead, will they be able to end this cruel killing game? Will Sammy be able to escape from this cruel prison alongside everyone?

The killing game continues with Monokuma's oddly specific motive. With Luna's whereabouts unknown to the others, everyone's worries further increase as another tragedy is impending to happen.

Ralf and Kurro were sent in a cruel death maze in order to compensate for disobeying the rules Monokuma set. However, before their return, they found out that someone is pulling some strings behind their backs. How will this revelation impact the fate of everyone tied in this killing game?