As a dejected Haruka watches the real Sara pull the same fortune as yesterday (“sachet”, due to the zombie not being beaten), Kazuki resigns himself to being a kappa for the rest of his miserable existence, unable to be seen by anyone.
But Enta and Toi aren’t ready to let him give up on himself for Haruka, and Keppi seems game to assist where he can. As Kazuki laments being “outside the circle”, he’s really in the middle of two of them: his family and his kappa crew.
Then Reo, one of the cops who is currently separated from Mabo, his partner, encounters Haruka feeding Nyaranko. Haruka assumes he’s to be arrested for theft of Kazuki’s smile; Reo decides to roll the dice and extract his desire, if it is indeed desire and not love, tossing the cat aside.
The cat lands on Enta as he’s pleading with Kazuki, and Keppi reports that Haruka has been kidnapped by the Imperial Army of the Otters, long-time enemies of the Kappa, and of which Reo and Mabo are soldiers. Kazuki resolves to rescue Haruka at any cost.
After a brief history lesson from Keppi (including use of a modified Alexander Mosaic), he and the lads descend into the Otters’ vast industrial facilities dedicated to extracting desire from humans (now that there are no Kappas left other than Keppi) and creating Zombie Kappas.
Kazuki locates the box in which Haruka has been stashed, but it’s already part of the production line, and keeping up with it on its unrelenting path to oblivion is tough, even with help from Keppi.
Ultimately, Kazuki comes up a little bit short, and Haruka’s box begins its long drop into the matrix that will turn him into a Zombie Kappa. This means the end of Haruka, and the lads learn for the first time that the Zombies they’ve previously defeated are not only gone, but ceased to ever exist (hence their disappearance from photos and memories).
Keppi presents one last chance to save Haruka: a Shirikodama transplant, with Kazuki as the donor. That will mean the brothers will swap fates, and Kazuki is fine with that, since he feels he was always “outside the circle” anyway.
Obviously, neither Enta nor Toi will allow him to make that kind of sacrifice. Toi uses his gun to reverse the winch sending him down, and Enta shows him the miçanga Haruka never threw away, because he never gave up on his big bro.
As a confirmation Haruka never gave up, his box is blocked from conversion to a Zombie Kappa because it reads as “love”, not “desire”; Otters are only interested in the latter, so he’s marked for return. The bad news is, he’s headed straight for a giant shredder (evoking memories of the “Child Broiler” in Penguindrum).
Keppi rolls up into a soccer-sized ball, and Toi and Enta pass it to Kazuki, who uses a bicycle kick to knock Haruka’s box off its fatal course. A sleeping Haruka pops out of the box, and Kazuki is there to catch him.
We learn that Haruka had the sachet because he encountered Kazuki’s real mom shortly after Kazuki took his leave of her, and noticed the sachet had been left behind. He pleaded with her not to take Kazuki away, and she assured him he didn’t need to worry about that.
With that, the Sachet Zombie Kappa is defeated, and the lads regain their human form. No mention of a Dish of Hope, nor any tearful reunion with a newly-awake Haruka, just the three lads in the small Kappa plaza, and Kazuki suddenly feeling different than the last time he had his human body, no doubt because now he knows he’s not outside the circle, but in the center of it.
The Otter Cops don’t seem too perturbed about their latest defeat, and will certainly have their eyes on the Kappa boys henceforth. The episode closes with a flashback to long ago when the two of them stormed the Kappa castle to kill Keppi, only for Mabo to be gravely wounded, which may explain why his heart is clockwork?
Who knows…lots of blanks left to fill, but at least now we know for sure this is a war between the very well-supplied Otters and the last surviving Kappa. This was an episode that effectively departed from the usual monster-o-f-the-week formulae of earlier episodes, and was a thrilling adventure to boot. With Kazuki in a much better place emotionally, the Kappa triad looks better equipped to handle the next challenge thrown their way.