The July 2018 issue of Tokuma Shoten’s Comic Zenon magazine has announced that Takayoshi Kuroda will launch a new manga with Michihiko Tōei titled Antagonist: Sengo Nihonshi-jō Saiaku no Tero Jiken no Shinjitsu (Antagonist – The Truth Behind the Worst Post-War Terrorist Attack in Japan). The manga will launch in the magazine’s next issue on June 25, 2018. Tōei is credited with the original story, while Kuroda is credited for the art.
The magazine teases the manga’s story as beginning with an incident named the “Bus Passenger Disappearance Incident,” which starts the “Heltopia Incident,” known as the worst terrorist attack in Japan after the war. The perpetrators of the attack are modified humans.