I am suspecting the general plot of this one is that as a way to give a strong hand to good yukkuris and reduce extraordinarily the ammount of shithead herds, this breeders wents and made particular super yu's meant to live alongside normal nicehead wild herds, so when shitheads come to try to conquer, they are repelled.
And probably bodied chen, Dosu Chief and the others were there checking the plan was going well. Which is extra meaningful since we know Chen, Chief and Kime suffered under shitheads so this maybe their true retribution.
Just a recap... Both Buke and Ran gave birth to their respective young. Buke lost her kitten to the scum yukkuri that killed Chen's mother Ran. She then adopted Chen.
From what I'm understanding, what this is all about was that a gold-badge Reimu misinterpreted her training, and 'punished' a child (unknown severity), which caused a huge rash of people to abandon their pet yukkuri, and even cause the entire system to be reviewed.
This lead to mass migrations of pet yukkuri to move into the wild. They do what most strays do -- move in, take over, eat everything. The real threat, however, was the rise of insects that fed off the yukkuri that died.
Mister Breeder opted to try and send out a Dosu to regain control, but saw how expensive/risky it was, and opted to just send out this team of 'fighting yukkuri,' instead. In order to prevent them from perceiving it as a human threat, he opted to stay back and allow all things to be controlled by the yukkuri, themselves: Boss (Kime), Chief (Dosu Marisa), and Chen. This has helped them cull the stray population and keep the scums under control, thus in turn, reducing the pest population due to them leaving the corpses of yukkuri around.
From what I'm understanding, what this is all about was that a gold-badge Reimu misinterpreted her training, and 'punished' a child (unknown severity), which caused a huge rash of people to abandon their pet yukkuri, and even cause the entire system to be reviewed.
Reimu holding a pencil and humans having that much of a lashback, I suspect something serious. Maybe eye loss.