Marisha loves her mother. Mommy is always kind to her and her sisters, the twin Reimyu and Wasa Reimyu. Now, five more little sisters are going to be born and she will love all of them.
Mommy is not their real mother. Few days after Marisha and her sisters are born, their real mother are taken away. It's a harsh life while Daddy asked their owner to look for new mother.
At first, the owner suggested another kind, he had enough with Reimu. But Marisa insist that while Marisha would be fine with her father, the Reimu side of the family won't be happy with parent from another type.
It's a long and difficult search. Finally Marisa decided that pet yukkuri are too arrogant. She settled with a stray Reimu who she found is able to take care of children.
At first, the new mother Reimu is troubled. But finally she soften up and accepted those children as her own. Moreover, this Reimu can do housework and always helped the children before they even asked.
She helped them to go to toilet, making them understand the happiness of being clean and forget the how they used to feel that going to toilet is a suffering because of the pain and dirtiness. Mommy always licked and massage them, then lick them clean.
Marisha is a Marisa type. She had a natural instinct to be independent out of her mother. But when she tried running with father Marisa who wanted to start teaching her children, Marisha tripped and cries. Reimu quickly calm her down and told Marisa to never again endanger the children.
Likewise, Reimu insist that the children are still too young to study. They can do that when they have grown up more.
Marisa tried to force Reimu to have children. She thought with her own children, Reimu will be so focused, Marisa can play with her own children. Unfortunately Reimu is already neutered and Marisa conceived her own children.
The pregnancy is so taxing on Marisa, and when she took her eyes away, all the babies are already loving Reimu more than their own mother.
Then the fateful day arrived. They went to the badge test. Marisa will be taking gold badge test while the children will take silver badge test, then gold badge test after that. Besides, Marisha can already count to 3 even though she's still a koyukkuri.
Marisha is confident. She heard that daddy passed the silver test without much effort, it's a piece of cake. She's excited to meet with new friends and possibly get herself a girlfriend too.
Marisha called to a Reimyu, which ends up with conflict. Marisha keep talking about herself and disturbed the other participants in the waiting room. This is when she realized that the other children are no longer speaking like baby. They can count to numbers Marisha never knew, all of them.
The test staff moved Marisha to another block where she saw her sister in a fight with another Marisa. Her second sister Reimu is a quiet girl who doesn't speak even when being yelled at.
Test staff then found out that the Reimyu is following that Marisa but not answering when asked why. Finally she cried and admitted, she's told to just follow the yukkuri in front of her. Unfortunately that Marisa want to go to the toilet and in confusion Reimyu decided to tail her.
Since the toilet issue is brought up, the staff reminded all participant to finish their business in the toilet before test. Don't worry about shitting out their precious learning because knowledge that got thrown away just from shitting like that are not supposed to qualify the test in the first place.
Marisha saw how everyone can go to toilet on their own, shitted and then clean themselves without help. In comparison, Marisha and her sisters still use diapers.
As expected, they failed the test. Marisha pissed when she felt the cold floor under her feet. She can't read calendar or time, or other simple questions. It's a perfect 0 for her and her sister Reimyu.
The third sister down, they are thrown out of the test for disturbing other participants.
Lets have a flashback. Marisa family's owner first bought yukkuri because his girlfriend wanted cute yukkuri. She wanted cute toys but both don't know anything about having pet yukkuri.
What she have is just a shallow knowledge that gold badged yukkuri don't turn into scum. She also wanted baby yukkuri because they're still cute. Both are almost mutually exclusive because yukkuri won't manage to pass the test before adult. Even if there are koyukkuri with gold badge, the price is more than what the man wants to pay.
Finally both settled with yukkuri fruit of "gold badge pedigree". This is cheap enough for him to justify buying yukkuri.
But the product is actually very problematic. Shops often got claims from not-knowledgeable buyers who think they get a yukkuri that won't become scum with cheap price. Thanks to that the product is only sold to specialists like researchers, breeders and abyusers who know what they are getting.
Coincidentally there's a university with yukkuri faculty here so the shop mistaken that pair as students who buy yukkuri for their study.
Gold badge pedigree are yukkuri fruits from gold badge parents. They are better than normal yukkuri because since birth they are relatively more well mannered and easier to teach. But of course, yukkuri being yukkuri, you need to know how to raise them properly.
Because her apartment don't allow yukkuri, the girlfriend put the yukkuri in her boyfriend's house. He's happy too because the girlfriend often came to visit and her mood is good after playing with the yukkuri.
She read them story and teach them, nothing serious, just for her enjoyment.
Both got lucky because they bought pair of yukkuri with good quality. Both yukkuri passed silver badge test with just play-teaching by the girlfriend. They never do the gold test though because it cost too much.
Then the boyfriend is overcomed by greed. He thought it's so easy to breed yukkuri and he can sell them back to the shop for more money than what he bought them for. This is business.
They never realized that Reimu and Marisa's paste is already not as pure as when they are born. Unfortunately because they still eat and shit cleanly, the owners never realized that.
Come the fateful day. Marisa and Reimu asked for little one, which the boyfriend allowed because he's having great expectation for his easy money. He also want the babies to return his girlfriend's mood, who is now bored with the grown up yukkuri.
But one day when they go to the park, an incident happened. According to witnesses, Reimu came to other yukkuri and starts bragging her children to a pregnant Sanae (sharing her wisdom, Reimu said). Angered from being ignored, Reimu pushed the Sanae, knocking her to stone, damaged her paste core and kill her along with her children.
Faced with choice between paying 200'000 Yen for Sanae (+ the food and living cost) or handing over Reimu, the choice is easy.
Then the boyfriend just put the rest of the family in soundproof box as usual.
Seeing that the easy money plan is going nowhere, the boyfriend decided to take Marisa's request to find foster parent. But they can't find any yukkuri who will be a foster parent.
Pets and owners can see Marisa is already beyond help, so they straightly refused. They are even banned from entering Yukkuri Land for disturbing other visitors and the staffs.
Unable to accept reality, Marisa starts changing her overly high standard into any yukkuri that can be under her, obey her and take care of the family.
Then she found a stray Reimu in the park who take care of not only her own children, but also children of the neighbours. This is it.
They took the Reimu.
Reimu is then brought to clinic to be sterilized. The doctor reminds the man that yukkuri can have conception on their own, so it's best to sterilize both. But the cost, and the money making plan, made the owner not sterilizing Marisa.
Meanwhile, the girlfriend hold grudge to the Sanae owner who she said took Reimu away. She assaulted that person, which failed and she got taken into custody by police. Without any relative or friend to come and pick her up, they contacted the boyfriend, who break up with her on the phone.
Finally, when they failed in the test, for the first time the owner asked his friend who studied yukkuri.
He's devastated because he had spent 90'000 Yen for the test. If they passed the silver badge test, half of the money will be returned, but there's nothing for those who failed.
He even made debt to take the test, dreaming that even if only one got a gold badge, he will break even.
His friend who also have enough with this guy. He told him the harsh reality: no, yukkuri shops are not buying from amateurs because there will be no end of it.
Besides, pet shop are not simply buying badged yukkuri, they are buying a warranty that the yukkuri won't rot (or at least unlikely to turn into scum up to a certain standard). That's why they have contract with factory or breeders to supply them.
Rare yukkuri are different story, but this have to be exceptionally rare type, not the already "common rare" like Sanae or Ran. Even in that case they have to be already trained.
Livestock yukkuri... well, they can buy it from anyone, but at 5~10 Yen per stalk. In smaller cities, school banned students from doing this trade to get pocket money.
Yes, that's the reality. Nobody is going to buy already spoiled yukkuri. Well, many abyuser like him or his colleagues would love to get spoiled yukkuri, but this friend kept it to himself because he doesn't want his campus to be this guy's dumping ground.
Phone is closed, and the owned angrily throw the family. He ripped off the bronze badge and walks away.
Marisha look for her mommy to get away from this uneasyness. There, mommy looks so easy, she must have already thought of a way out, right ?
No, Reimu is just happy to be back. She went to the roadside and starts to eat the bitter grass she so hated when she's small. It tasted bitter, but also Happyness. This is her world, she's finally home from the living hell.
She told Marisha that all is according to her plan. She spoiled the children so they will fail, be abandoned, and live in suffering.
When taken, she already said many times that she has her own children. Marisa and her owner don't care. Marisa even threatened to ask for a total annihilation of the park's yukkuri.
So Reimu planned this revenge. Besides, if Reimu die, that will mean only more victims.
Now she's free.
She also told Marisha that compared to her sisters, Marisha is quite smart. She came to Reimu when all her other sisters are just crying because they are so spoiled, they can't even say what they wanted.
All they know is cry and mommy will answer their need. They can't walk because mommy always carry them around.
If Marisha even learned a little bit, she could have passed silver test. Of course Reimu is not going to let that happen. She spoiled Marisa rotten.
She hate them, there's no way she will give them love, no way she will teach them how to survive the world, how to strongly face uneasyness. Now she hoped them a long suffering.
Meanwhile, the real mother Reimu is not killed. Sanae's owner is not satisfied because Reimu is not able to understand her own mistake. She handed Reimu to researchers with request to make her understand.
They tried implanting good quality paste. At first there's resistance, but as the paste mixed, every once in a while Reimu will understand her mistake, cries and beg for forgiveness. Then she returned to her old self and become quiet, remembering all the uneasy feeling of admitting her own mistake.
Feeling sad, Sanae's owned whispered to the researchers to put Reimu out of her misery next time she has a fit.
Marisa's family became abandoned yukkuri who beg to peoples. When Marisa got over the line, she take a child's shoes and use it to demand being taken as pet.
This is when stray yukkuri from the park came out to beat Marisa. One of them returned the shoe and beg to the human. They will deal with Marisa, so please don't have extermination.
Marisa's family are dragged by the strays to their city and their suffering continues.