The Last 2 Chapters of the Killing Game

                                    

                                          
Chapter 5: Despair Jockeys:
Mirroring the storyline that got them kidnapped by Junko in the first place (not that they remember), Monochio's motive for the 5th chapter is another D4DJ BATTLE TIME. In one week, whichever of the three surviving DJs most impresses it, that DJ will win the title of Ult. DJ, get to go home, and get to take one person with them.
Mirroring First Mix plot points, this chapter focuses primarily on Rinku, Maho, Muni, Kyoko, and Shinobu, and the envy, insecurity, and inferiority that permeates their relationships. Muni feels at odds with Maho because if Maho wins, she's taking Rinku home with her. Muni and Maho feel at odds with Kyoko and Shinobu because they catch Rinku with Kyoko and Shinobu multiple times. Kyoko feels at odds with Rinku because she catches Rinku with Shinobu.
Only Shinobu and Rinku don't feel awkward, and that's because, ever since Nozomi's EMP attack against Monochio (even though it failed) and the blackout in the VR lab, Shinobu has been working hard to figure out a way to end the Killing Game. Along the way, she's gathered information about the outside world, including a so-called Ult. Hope. Rinku doesn't feel awkward because she's Rinku.
At the same time, M4 is at odds with everyone else because they protected Dalia until the very end, even after she was found guilty, and none of the four would ever admit any of their guilt. That leads to tension with RONDO which leads to tension with Miyu (since she's close to Tsubaki and Saori both). To redeem themselves, though, M4 proposes a plan. Saori will help one of the other DJs win the contest.
Maho and Shinobu create a pact with Saori wherein they will allow Maho to win and escape with Rinku. The night of the show, Shinobu calls Rinku away for one final farewell. After Shinobu departs, Kyoko walks in and talks to Rinku about her feelings of jealousy, inferiority, and insecurity. Then Muni joins, having seen Rinku disappear with Kyoko and Shinobu. Then Maho joins and a fight breaks out.
By the end of it, Maho is the winner of the BATTLE TIME and Rinku and Kyoko are dead, the former beaten and strangled to death, her blood coating the walls and floors. Kyoko, meanwhile is hanging from a catwalk by an extension cable.
The trial reveals that Kyoko is the killer, both of Rinku and herself. Driven to Despair during the five-person fight, she finally catches Rinku off guard alone. The shame overwhelms Kyoko and the students are able to prove that she's responsible because the cable she was hanging by came from a room only she could access. It was a room behind a musical lock that could only be opened by an Ult. Vocalist.
This is also when Kyoko finally remembers her Talent, but it frustrates her because she perceives it as a worthless Talent since she's surrounded by vocalists all the time, including Tsubaki, who is an Ult. Vocalist.
Monochio demands that someone be executed since Kyoko is already dead and Shinobu volunteers. She claims that it is for Kyoko's sake, but the truth is that she knew how to hijack executions. It was supposed to be Rinku's task to shut them down once she and Maho were free, but after Rinku's death, Shinobu improvised.
Her execution is "Dance 4 Deadly Justice" and starts off with her playing an FPS before being deposited into a racing game, then a fighting game. It is during the fighting game that she breaks out of the level and entices Monochio to chase her.
She corners it and forces it to play against her in the fourth and final level of her execution. It is a rhythm game with a Kyoko avatar and Shinobu chooses the song "Electric Chaos Countdown", drowning out Monochio's execution music for the first time.
By the end of the song, the game crashes and Monochio's body is destroyed while Shinobu's is nowhere to be found within the wreckage of the execution.
The DR trope most prominent and important in this chapter is the "crazy plot twist" of the 5th trial, which in this case was everything Shinobu did to put herself in a position where she could hijack and shut down her own execution and Monochio at the same time from within the execution itself.
Another DR trope in this chapter is the face-slap. In this case, Rika and Tsubaki fight over which unit is more responsible for what happened to Aoi and Dalia and it ends with Tsubaki slapping Rika.
Chapter 6: The Ultimate Motive, and the Ultimate Class Trial:
With Monochio dead, but still no way out of the school, the survivors explore every inch of Hope's Pinnacle, even places that used to be locked. In doing so, they find one last recording from Monochio about a final class trial.
In it, the survivors must identify the masterminds. If they get at least half correct, they are all free to leave. If they get less than half correct, they must all face their executions. To make it a little fairer, however, each execution is survivable, but only just barely.
In the end, the survivors fail to guess 3/6. They misidentify Kurumi as a mastermind because they had a photo of her and Kokichi leading the DICE group with no context. Hiiro is able to persuade them that Nagisa is the mastermind, hence why Hiiro had to trick her into an early grave, although she had no idea Miiko's prank was going to be the weapon that Nagisa used. Rika tried to just give up her identity but Monochio refused to accept it as valid on the grounds of cheating. Noa was misidentified as a mastermind because of her behavior at the end of the third trial.
Rei is able to figure out Esora because of her faint memories of Esora's rivalry with Byakuya, including her collusion with the Towa Conglomeration. And Maho is outed by footage of herself goading Kyoko into killing Rinku. It was footage she failed to clear while everyone else was searching for a way out of the school after the 5th execution.
Junko gets an obligatory Trial 6 cameo, as Rika calls her up to prove that she's M4's mastermind.
Failing to meet Monochio's standards, the survivors are put through their executions and only Miyu, Tsubaki, Hiiro, Saori, Marika, Towa, and Esora survive. Miyu is saved by luck, Hiiro's fortune told her she would survive, Towa was rescued by Miyu, and Esora beat her execution, although she failed to save Rei from hers. Saori and Marika were spared from their executions entirely.
Another thing Rika did to prove her identity was to confess her true Talent as the Ult. Arsonist and shoot a blast of flames from her palms to make a point. The flames wounded Saori and Marika, and because it would've been considered unfair to send them through their executions while they were injured (thanks to Haruna's hand in programming Monochio's adherence to rules and fairness), the fiery attack became the execution they had to survive, which was far easier than what would've been in store for them. There are several endings which I will cover in another post.