Black Mist
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...
Aired 03/03/2022EP 8 - Black Mist
Tokyo 24th Ward
Enter the 24th Ward, a man-made island inside Tokyo Bay. Three of its inhabitants: Shuuta, Ran, and Kouki, have been best friends since childhood, but after a deadly incident, everything changed. A year later, reunited for the first time, they receive a mysterious phone call. On the other line is a familiar voice—from a friend who’s supposed to be dead. Together, they’ll have to save their home.
(Source: Funimation)
Note: The first episode was a 1-hour special.