Marisha and her family are dragged by the strays to their town. It's located in the outskirt of the town, far enough to not disturb human.
This is place of the outcasts, city of scum. There are abandoned pets, children thrown away by their family, or yukkuri exiled for breaking clan's rule. They are the lowest of low in yukkuri society, the peoples who can't fall any lower.
Marisa is taken to a brothel to work as slave.
The children are usually left to die, but because many yukkuri in the city had sympathy for them, they are also taken. While officially Marisha and her sisters will be slave, they will be given jobs all children can do. For that they are even given place to stay and paid with food to eat.
Unfortunately they are too spoiled. When a one eared Chen offered them fruit, they don't understand. For Marisha and her family, the act of eating is started with their mommy biting the food soft and put it in their mouth to taste and swallow. Something on the ground is not food.
The job given to them is cleaning up. Marisha is put under Chen's supervision, but she can't do a thing.
Marisha is better. Her sister Wasa Reimyu are built to as "tragic heroine" type. She get what she wants by putting a pledging face and expect others to feel sorry for her.
That's not going to work for the Alice assigned to her. Alice is all too experienced to be swayed by act like Reimyu's.
Even the Patchouli that Reimyu thought will stand for her actually told Alice to not be so soft on the useless Reimyu.
The other children ? Well, Wasa Reimyu throws a fit and the Marisha quintuplet has even lost their ability to speak.
By the end of the day, by sympathy, the house gave Marisha food for eight koyukkuri. It's a mercy, but they don't understand it's a food.
Chen tried so hard to tell Marisha. Only their real parent will truly love them. Nobody else will. That's why when their parents are gone, they have to live on their own.
Finally, a scar faced Marisa came. She has lost patience and beat Marisha around. Yeah, she's a scum, she doesn't understand the Oh So Majesty Pet Yukkuri's greatness.
Chen has been too patient, but he's not that nice of a yukkuri. Well, actually he's so nice because instead of killing these good for nothing yukkuri, he would give them place to live and they can get food even without working.
He told his hench-yu, a big retard yukkuri they call Deku, to throw the children into the deepest part of the brothel, the poo poo prison.
Visitors sometimes go there too dump their shit and look down upon the slaves.
Everyday, shit from all toilet in the brothel are dumped to the dungeon. A young Reimyu is tasked with that. She's an sold by her parents and is now in apprenticeship with an Alice. But because she's still too young to take customers, Reimyu is given these kind of job.
Reimyu felt sympathy for Marisha's family, but Alice stopped her. A Patchouli tried that, and rather than gratefulness, Marisha and her family instantly registered the Patchouli as their slave and demanded more food. Reimyu can try if she wants, but Alice is not recommending it.
Reimyu regretted that she does because ever since that day she have to avoid the place or else she will be terrorized by Marisha and her family's screaming at her.
One day, boss Marisa bring a new inmate. It's a premature yukkuri thrown away by her family. At first, Marisha thought this can be an entertainment to forget their suffering, someone lower than them.
But the premature yukkuri is not responding as they wanted. She's always happy and even eat the shit in the dungeon like it's so tasty.
Even worse, the peoples in the brothel seems to like the premature yukkuri. They sometime take her out and play with her, just like human play with cats or dogs. At least, everyone loved the always innocently smiling retarded premature yukkuri than Marisha and her family.
They even beat Marisha when they tried hurting the premature yukkuri.
Marisha's last piece of hope is that their real mother is still alive and awaits from them somewhere. Yes, their platinum badge mother will bring them back to life of luxury.
One day, Marisha and her family are taken out for a show. Their dad has caused a problem and is now punished. This is a popular show in the town. Lets stuff stones to her mamu mamu, and amazing! The stone will come out of anyaru.
Then the anyaru is sealed, so all the shit flow out from her mamu mamu instead. Well, yukkuri are yukkuri, so unlike operation by human doctor, there are times when all the holes got sealed by mistake. The MC Patchouli said she heard it's a real suffering because everyone died with horrible face.
Father Marisa saw her children, but doesn't give the expected reaction. MC Patchouli then offered if one children even stand up to take her place, Father Marisa is free while her children will be used in the show.
How it goes is just as expected. Father Marisa has lost all her love as a father. Meanwhile the children won't sacrifice themselves, they have their real loving mother.
Father Marisa laughed. She told Marisha how that bitch killed a rare type pet yukkuri and the children. Yes, a yu-murderer. She must be dead by now.
Oh right, Marisha saw everything. Hearing that, Marisha remembered things she saw but didn't understand back then. A smell more unpleasant than poo poo, a Sanae and from her mamu mamu, dead babies.
Her real mother is a murderer. Marisha lost the last of her hope.
One night, Marisha woke up in the middle of the night. She saw boss Marisa talking with one eared Chen.
Boss Marisa told Chen about love and how those children ends up as they are, or at least what she's taught by the abyuser she used to live with.
Spoiling is not the same as loving.
Parents who really love their children will not just spoil their children. They will be harsh and teach the children to be strong,
Imagine, if Chen came to the brothel and her favourite girl is booked, what will Chen do ? Chen will just think it's too bad and come another day.
But recently a scum Marisa came and she starts demanding the house to bow to her demand.
This is the difference. For Chen, it's just a small "unhappyness" she can shrug off easily. But for the Marisa, it's a big "uneasyness" she need to kill someone before she can be satisfied.
Compare with Chen, the only time she ever want to kill someone is when her parents are killed. It have to be that much to make her mad. Yet that Marisa want to kill someone just because her girl is already booked by someone else.
Scum have standard so tall, it's already unreachable. They can't reach happyness like other yukkuri.
In contrary, the premature little one might be the happiest. She's already happy just by being alive.
But Boss Marisa doesn't think everyone should be like that. While happy, they leave nothing in the world. It's fine to have desire, what's important is to know the limit of it.
Chen then ask about Marisha, what about that poor yukkuri now living in the dungeon ?
Boss Marisa is thinking about that too. How could a kid got spoiled rotten like that ? This is usually impossible even if the mother is a Deibu because the mother would have killed them for being annoying and making her uneasy. Boss Marisa then remember a story she heard. There are human who kidnap stray, made them unable to have children anymore, and force the kidnapped yukkuri to take care of their pet as slave. These yukkuri victim could spoil the children in fear of their life, or they want to ruin the children's life.
Marisha, being smart enough, cried as she understand all they are talking about. She knew she have to change, but she's also too spoiled, she doesn't have enough willpower to fight against easyness.
Marisha's sisters are dragged out. They are grown up large enough. At first, both thought they will be forced into prostitution, but this is wrong. Nobody want to fuck the poo poo slaves. They want to held another mamu mamu stoning show.
This is the first time Marisha heard her second sister cried like never before. The girl who almost never speak screamed at the top of her lungs.
When she returned, Marisha told her to wake up. This is their life and no need to dream about meeting a prince and taste love anymore.
Look outside, the little Reimyu who used to dump shit into the dungeon is now finishing her apprenticeship. Her seniors dressed her up, gave her make up and she look beautiful.
Her first customer is a kind traveler swordsyu Myon who got taken in as bodyguard. She fights even better than Boss Marisa. She will surely be gentle with Reimu.
Well, things are bad for Marisha too. There's an Alice with "special taste" who came to rape her, a dirty scum Marisha smeared in shit. She raped Marisha, crushed the babies again and again.
When the courtesan Reimu is having her first night with Myon, Marisha is raped in the dungeon.
Marisha cried for mommy instinctively. She has decided to stop crying like this, but she can't fight the education she had received. This excited Alice even more.
Marisha's only hope is a baby that got thrown away and hidden in the corned. Nobody noticed it except Marisha and the premature yukkuri who approaches it.
Marisha is angered, she yelled to the premature yukkuri who understand that she did something bad and quickly go away.
This is when Marisha realized, the premature yukkuri is too retarded to think of anything evil. She might be returning the baby to Marisha, but because she learned she must not do that, she quickly leave. Marisha's baby died away from her reach.
Marisha's sisters died. The quintuplet died and became one with the sea of shit.
The second sister had all her holes sealed. Her body became inflated with shits she can't excrete and the pain finally made her run to the wall. Her body pops open, scattering shit and innards all over the place.
The third sister died after anti-yukkuritis from having shit flowing out of her mamu mamu, causing infection and unbearable itch along with the shame.
One day, the brothel is in sad mood. The premature yukkuri in dying and everyone is crying for her, even the strict Boss Marisa. What's more surprising, an old Reimu, master of this brother whom Marisa has never seen before, came down to send the premature yukkuri away.
Marisha and her family has less value compared to that premature kid.
Finally, Marisha's turn. She's also dragged out for the mamu mamu stoning show. The host is happy that they still have material left for the show.
The Reimu kidnapped to be Marisha's new mother run back to her home. She's afraid, but glad to see her children alive. They are playing with their new sister a Patchouli.
Seeing this, Reimu understand that her husband has taken a new wife. This new wife cared for the children, and seeing how children of different type can play together like that, she know they are all loved equally.
Reimu asked the children who noticed her to call their parents because she have something to give them.
When they returned, they saw a yukkuri split in half. This is her last present, she want to at least leave a part of herself in them.