The KANAE system was based on artificial intelligence that was developed by Kanae, who was Koki and Asumi's mother. In the past, the same AI was installed on a vehicle that got into an accident leaving 0th and Tsuzuragawa injured. 0th is suffering from the after effects of this accident caused by the faulty judgment of the AI, and has developed dyslexia. Kanae racks her brains to come up with a solution, but is told that there is a fundamental flaw in her system. After hearing that 0th has gotten into graffiti, she gives up on development. The 24th Ward has been developing steadily, but after Kanae's death, the fate of the city changes drastically.

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?