Anon trades some sweets with a Marisa to hire its services as a guide to city yukkuris. It rejects the sweeter choices as they would spoil the tastebuds, and tells its Meiling mate to store what they received.
Marisa leads Anon to the back of a building, where a Reimu and two Komarisa are, first identified by their voices talking about how cute they are. Anon is shocked to see how filthy the whole family is, and Marisa explains that the Reimu was originally a pet yukkuri, and the reason why the children are dirty is because it didn't want to lick them clean, like normal parent yukkuris do.
The family starts practicing singing, which is totally awful, and proclaim about the prettiness of their hearts. They later move to a street, where they try to attract an owner with their awful signing. Anon is surprised to hear that the Reimu is able to count to four when preparing the beat.
However, their attempts irritate a youth, and they don't realize it. As Anon watches, Reimu stupidly moves just like the youth tells her to, recognizing his action of looking at his shoes as checking whether the pair he's wearing is okay to kick yukkuris with. Reimu gets kicked first, and one of the Komarisas takes out a branch to threaten him as the other wails. The former Komarisa gets kicked as well, but still survives (picture), screaming about its feet that is some distance away. It gradually weakens and dies.
Marisa calls to Anon, who realizes that the youth is still hitting Reimu. The other Komarisa has excreted on itself, screaming for help. It notices Anon and Marisa, and rudely orders them to help, citing it's cute. Marisa brushes it off, and the Komarisa gets angry. But then it realizes that its mother is dying, the youth having dealt critical damage.
Despite the damage, Reimu doesn't realize its mistake, even as Marisa and Anon point it out. Marisa then notices that the Komarisa has mold growing on it, which sends the Reimu into a panic. If Reimu had licked her children clean, this would not have happened, and Komarisa realizes it might die. Even as Komarisa asks its mother to lick it, the mother screams at it not to approach, and wails its desire to continue living.
Anon sighs and points out that it's already dead, and explains to it why it ended up like that, concluding by saying that all the blame lies with Reimu. Reimu then dies without being able to say a word.
Anon then points out that the mold on Komarisa has spread a lot, saying its probably because Komarisa was uneasy. Komarisa begs Anon to get it off, or Marisa to lick it, but both reject the koyukkuri. In the end, Anon cuts off the part of its feet with the mold, and puts some bean paste bun nearby, telling it to eat, or else the mold would spread further. Komarisa crawls desperately, saying its dream to mate with a pet Reimu, and make lots of little ones. It eventually dies muttering about the pain it's going through, as its excrement reveals the extent of the mold.
Anon thanks Marisa for helping in his observation, but Marisa points out that what happened was probably 'abuse' instead of 'observation'. Chuckling, Anon turns off his video recorder.