A Town without Human
Yukkuri tearing off trash bag and eat, exclaiming happyness. This is not a strange view in the city, what's unusual is the scale.
All around the city, yukkuri are running and eating trashes as they like.
Normally, human will kill them, or extermination will be held. These city yukkuri know that and thus they usually hide themselves away from human gaze. If caught, the lucky ones will die instantly and those who are not will hope they're dead already.
But there's no human. Not just that, there's a lot of trash and boxes to be used as home. They all proclaimed this as yukkuri's easy place.
A pair of smarter Patchouli and Reimu pair is worried. Things are too smooth to be true. The only explanation Reimu can came out with is that there's a total extermination and now they're in Yun-heaven.
Is this really an easy place ? Of course not. This is an abandoned factory complex out of the town that has been converted into compost processing facility. The buildings are left as it is and from certain places, trash are feeded into the complex. From yukkuri's point of view, Mister Food came out on its own.
Human produced a lot of trash, and to handle it, what could be better than the shitbags known as yukkuri. Especially city yukkuri because they're used to eating trash and will be fine. Too boost their appetite, the trash bag are also imbued with vanilla essence, covering the foul smell and gave faint sweetness that made even rotten food taste Happyness! to the yukkuri.
Spicy and bitter food are out of the question and the yukkuri leave it aside, but soon it wouldn't be a problem either.
The yukkuri enjoyed an easy life. Without worry of food or shelter, they starts making little ones. With more population, they can't choose their food anymore. Parent yukkuri taught their children to mix Mister Spicy and Mister Bitter with other food and soil, then it can be eaten.
As time passes, yukkuri has grown pass the critical mass. Even consumptive human society has its limit and can't produce trash that can compare to yukkuri's population growth.
Competition for food and shelter became riot and murder. Yukkuri starts breaking into buildings and group are formed. The buildings would do raid on each others and the defeated got made into poo poo slave.
Routinely, there's also rain that wash away all the corpse and shits left by yukkuri all over the city, as well as the unfortunates.
These paste works well for fertilizer so they're deposited to the mountain for reforestation project.
As the yukkuri society stabilize, there's again those who are hiding between alleys with nothing to eat, fearing of being bullied. Seems like this is their fate even if there's no human around.
Up above a building is a Marisa and her wife Alice. Marisa is the king, ruler of this whole area. Now, she's setting her eyes to the outside world. Next to the great wall that surrounded this place, the slave yukkuri taken from their accessories are stacking stones to reach the other side of the wall.
This is when a roaring sound can be heard and big metal bird flew through the sky, spreading white cloud. Instantly the yukkuri vomitted their paste and die.
Few survivors came out of hiding after all is over and rain washed the paste away. They declared this is their easy place.
They resumed the lifestyle like their earliest predecessor in this facility.
Cleaning up are done every half year.