A Marisa came to trash collecting station. Her hat is filled with trash.
Usually, peoples would think that Marisa, like other yukkuri, came to make a mess with the trash, but this Marisa is different. When dump truck arrived and finished collecting the trash, Marisa offered them the trash in her hat. The yukkuri is helping human to gather trash.
Before Marisa left, the man from the dump truck asked her, how many times has she done this. Marisa answered one, two, three... many times.
As reward for her hard work, Marisa is given a new cardboard box. To the side of the box is picture of Reimu and Marisa, signing that the box is specially made for yukkuri's house.
The man expected Marisa to help them on after this.
After admiring her new house she got as reward, Marisa hurriedly run back to her home behind a vending machine. There, her wife Reimu and her children, a pair of koyukkuri Reimu and Marisa, is waiting for their father.
Marisa informed them that she has been accepted by Mister Human and got rewarded with cardboard box for their new home.
A month ago, a rumour spreads among yukkuri. Strays who helped human will be rewarded with a great home to live in. Marisa is a stray who had survived for years in this city, she can't believe that story. But after seeing her friend Chen got rewarded with a very luxurious house, Marisa decided to try it.
Marisa and her family did house declaration and watch as her children played happily.
Their neighbour, Alice and Patchouli, also came to greet them.
Marisa and Alice went out together and heard paper sound nearby. This is a yukkuri trap, a box with floor covered with sticky glue to trap any yukkuri coming inside. The victim is a Deibu who demanded Marisa and Alice to help her.
Understanding than both the "single mother" and the daughter is a Deibu, Marisa and Alice ignore them and left. They understand that Mister Human's trash is Mister Human's and that they are living together with human, that's why they're given the cardboard house.
The next day, early morning, a truck came. The person from inside rip out Reimu and throw her to the truck.
Marisa thought that Mister Human is coming to clean the yukkuri that disturb peoples. But why would they do it so early in the morning ?
Before Marisa can get out to see the cause of her bad feeling, the box is raised. Marisa and her family is thrown into the dump truck filled with dead yukkuri. KoMarisa died instantly from the death stench.
Their neighbour Patchouli also vomitted her cream and died.
Marisa begged the human, thinking that the human has mistaken them with another stray they're exterminating, but Marisa and Alice's pledge falls on deaf ears as the worker activated the pressing machine inside, crushing the two families.
The box is suggested by researchers to help with yukkuri problem. It's an extermination tool.
From research, strays are split in three group. There's those who are plain scum, those who thought they can win against human, and those who are smart enough to stay out of sight.
The first two groups are easy to manipulate and destroy. Problem is the third group because they know human are dangerous and hide from human's eyes. Even if they look for food, only the husband would go out in secret while their family kept hiding somewhere.
After extermination is done, this third group could easily mass-produced more yukkuri to push the population back to it's original size, rendering the extermination to almost useless.
The box really help. True, the process is long, but this is needed to ensure that the smarter yukkuri would lower their guard. The box then will become house for their family, gathering them in one place to be collected.
The clean up is also done in early morning while yukkuri hasn't completely awake yet.
After that, the box is returned to trash collection workers who will hand the coffin back to unsuspecting yukkuri who are trying to get the cardboerd house.