On the day of the 24th Ward Gourmet Festival, Mari and the RGB trio have done everything they can to prepare to for the competition, but they find out that a quasi-gang organization called Yabusame, has bought up all of the cabbage that they were planning to use for their okonomiyaki recipe. Mari and RGB are at a loss for what to do, but their former teacher Kaba finds some cabbage from a friend at the local shopping district. Will Mari be able to overcome her obstacles to win the grand prize? In this dire situation, RGB receives a call again from Asumi...!

The person who instigated the Graffiti Wars was not Carneades but Ran's Mentor, 0th. Shuta hears from 0th about the whereabouts of Carneades, and hurries to the top floor of Cornucopia, but receives a call from Asumi. He sees a vision where one of Cornucopia's cranes lose control when it is struck by lightning. He has to choose between letting the crane fall to the ground and killing many people, or having the crane system fixed but the repairman dying in the process. In addition to that, the person who is repairing the system is apparently Carneades, who is the one presenting the trolley dilemma.

The KANAE system has frequently been producing errors. The cause of these errors were due to Asumi's consciousness being awakened inside the system, which confused the system when it was making decisions. Shuta is unable to decide what to do when Tsuzuragawa presents a trolley dilemma to save Asumi. Chikuwa arrives on the scene and they are arrested as terrorist suspects. Meanwhile, Ran and Koki are searching for "CMD," which appears to be the key to saving Asumi. Shuta reveals the truth behind the Takara Elementary School fire accident that killed Asumi.

When the RGB trio decides to go meet Asumi, they receive a call from her. Asumi presents to them a trolley dilemma that involves herself. They must decide between revealing Asumi's existence within the KANAE system which would lead to its collapse, or to fix the bug inside Asumi which would lead to everyone being controlled by the system. The trio are unable to make a choice between the two, and decide to go meet Asumi by any means. What is the future that RGB chooses?