It says pretty much all you need to know about this OVA that the material was too outlandish for the series.  Too outlandish for Golden Kamuy – think about that for a second.  The various OVAs for GK have all been pretty out there, but this one (adapting chapters 108-113, more or less) is at least somewhat plot-relevant.  That said, it checks all the boxes for this series – a flat-out nutjob, preposterously tasteless humor, Asirpa facepulls.  There’s never any danger of mistaking a Golden Kamuy episode for any other show.

Also of note here is that we have a conventionally-animated bear, and a quite important one too.  OVA 3 broke that taboo of course, but with this I suppose the CGI nightmare is truly consigned to the past.  The bear isn’t quite the main character of the piece – that falls to Anehata Shiton (Hori Hideyuki).  No author seems quite so taken with sickos as Noda Satoru, and he’s given us a laundry list of bizarre fetishes over the course of Golden Kamuy.  Some of these characters are based on real people, but as far as I know Shiton (his jam is bestiality) is a purely fictional creation.

You can pretty much assume with a Noda freak that he’s going to be incredibly outlandish and that he’s going to wind up dead.  And Shiton fulfils his end of the bargain, shtupping (or trying to) a wide variety of God’s creatures in the fields and forests of Kushiro.  He’s also a tattooed prisoner, which means he’s important to Sugimoto and Co. above and beyond his fetishism.  That fetishism gets Tanigaki in trouble, as Shiton has stolen his (actually Nihei’s of course) rifle, leading the locals to believe Tanigaki is responsible for defiling the local Kamuy.  As he stews in the village lockup, Sugimoto and Asirpa set off in charge of the true culprit (and his skin).

This quest takes on a new urgency with the news that Shiton has decided he’s going to turns his sights (among other things) on a bear.  Not only is a bear unlikely to be receptive, but he won’t leave much intact when he’s done demonstrating that fact.  This is some weird and sick stuff even by Golden Kamuy standards, but it delivers the highlights you’d expect.  It’s far from the series’ best material but it certainly makes you appreciate (in more ways than one) how unique it is.  With the fourth – and possibly final, if rumors of the manga ending are true – season likely a couple of years off, it’s nice to get a dose of insanity like this to help tide us over.