Jun'ichirō Tanizaki and Kyōka Izumi vs. Kōyō Ozaki

Jun'ichirō Tanizaki and Kyōka Izumi vs. Kōyō Ozaki is a skirmish fought between Armed Detective Agency members Jun'ichirō Tanizaki and Kyōka Izumi against Port Mafia executive Kōyō Ozaki during the Cannibalism strategy.

It occurred in the chamber of virus-stricken Ōgai Mori, who was being targeted by Tanizaki in an attempt to end the conflict raging between the Agency and the Mafia.

Prologue
With the failure of the other detectives to catch Alexander Pushkin and immediately following the confrontation with the Black Lizard commanders, Tanizaki secretly sets out to kill Mori in order to save Yukichi Fukuzawa's life from the mutually-destroying virus.

Battle
Though he is able to slip into Mori's chamber and almost succeeds in killing him, Tanizaki is stabbed from behind by Kōyō's Golden Demon. Tanizaki quickly projects himself into an illusion and attempts to attack her from behind.

Kōyō asserts that she can still sense his bloodlust and, albeit reluctant with fighting one of Kyōka's colleagues, quickly takes on the offensive. She controls Golden Demon to attack Tanizaki in an almost omnidirectional barrage of attacks, giving no chance of escape for Tanizaki.

Kyōka suddenly arrives in the room and counters Golden Demon with Demon Snow, much to Kōyō's surprise. Kyōka reminds the latter of her familiarity with the Mafia headquarters when she used to be a mafioso herself. As armed Mafia reinforcements arrive, Kyōka instantly grabs Tanizaki and has Demon Snow cut through the window to escape.

Aftermath
The mafiosi shoot at Kyōka and Tanizaki, but Kōyō halts them for fear that they might hit Kyōka. They immediately heed her order, leaving Kōyō to mournfully look down at the escapees. Meanwhile, Atsushi and the others soon retrieve Kyōka and Tanizaki to their getaway truck.

Manga and Anime Differences
After being stabbed by Golden Demon, Tanizaki projects himself into an illusion and tries to cut down Kōyō from behind. This is omitted in the anime and instead depicts Tanizaki's attempts at evading Golden Demon's attacks, though both media include Kōyō sensing Tanizaki's bloodlust. Moreover, in the anime, Tanizaki is explicitly cornered by Golden Demon amidst Light Snow, during which he mentally apologizes to Naomi Tanizaki. This is not shown in the manga; instead, Kyōka immediately arrives to rescue Tanizaki.

As a minor difference, Tanizaki wears his red jacket throughout the incident in the anime, unlike in the manga where he keeps it tied around his waist like usual. In the aftermath as depicted in the anime, Atsushi and the others are traveling on the road when they receive news on Kyōka's successful rescue of Tanizaki, while their truck appears to be on standby in the manga.