Episode 6

The hunters confirm their worst suspicion: the hotel's eighth floor has folded into an inescapable loop. Staircases, windows, elevators, and even the ceiling all deposit anyone who tries them right back where they started, and the wall clocks have frozen at 8:18, suggesting the devil has suspended time and that no rescue will come. Denji takes the news cheerfully, treating the dead end as license to nap, while Kobeni unravels, confessing she joined the division only to fund her brother's schooling.

As supplies dwindle, the episode threads in Himeno's history with Aki, recalling how she taught him to smoke and pushed him to stand up to grieving relatives who blame hunters for their losses. The respite ends when the slain devil reforms in the corridor as a mass of eyes and limbs. It proposes a contract: surrender Denji to be devoured and the rest walk free. Kobeni nearly carries out the deal at knifepoint before Aki and Himeno subdue her.

Cut off from his Fox Devil, Aki watches Himeno's Ghost Devil only feed the creature's growth, since the thing reveals it is merely a stomach with its heart hidden elsewhere. It names itself the Eternity Devil and swells on the group's terror, tilting the floor sideways as fear spikes. When Hirokazu and Kobeni move to kill Denji outright, Aki throws his own body over the boy and takes the blade meant for him. Refusing to lose an ally he needs against the Gun Devil, he holds firm until Denji finally relents, vowing to be eaten only so he can gut the devil from inside.

The team definitively identifies the looping floor as a devil's domain and rules out outside help once the frozen clocks reveal stalled time. Kobeni's breakdown and backstory establish her fragility, while the smoking flashback cements the bond between Himeno and Aki. The reformed creature christens itself the Eternity Devil and lays out its contract for Denji's life, splitting the group between those willing to sacrifice him and those who refuse. Aki's choice to shield Denji and absorb Kobeni's stab marks the emotional pivot, ending with Denji pulling his cord to confront the devil head-on.

Titled Denji o Korose, or "Kill Denji," the sixth entry sits entirely within the Eternity Devil arc and adapts portions of chapters fifteen through eighteen. "Kick Back" remains the opening theme, and the episode closes with the track "Rendezvous." The Fox Devil and Kishibe appear only by mention or flashback here.