Sign: Delicious! koyukkuris = 10 (yuan is the currency I suppose)
At a secluded spot under the bridge next to the grass, a Reimu type yukkuri is selling its own kids. Different from wild yukkuris, the city yukkuris won't let the poorly developed children be retaken by nature. They will sell these poorly developed children to other yukkuris, and use the money they earned to raise healthy koyukkuri. Even if you say this is an immoral action, there's no reason to apply a human parallel to these animals. On top of that, these city yukkuris are clearly influenced by the shadows of the human society. Maybe this scene is just a reflection of the sadness of city living in a human society.