This is a forest far away from human's area. Many creatures flourished in this forest, and that includes the yukkuri too. This is an easy place where they can live as they like.
Just like any creatures, as their population increase, problems starts to arise and the yukkuri gathered themselves into groups and then grow into clans.
This is story from one of those clans. The leader is a Reimu who's bigger than any other yukkuri.
Lets call her Reimudas. She thought of herself as the easiest yukkuri of all and live a happy and easy life.
What's her easy life ? It's to just be lazy, eat anything she likes (from other yukkuri's home), sleep anywhere she wants (other yukkuri's bed), have any treasure she wants (steal from other yukkuri).
Of course, other yukkuri is not happy with that, but it's useless to argue against a Deibu, she just dismiss it as everyone is not being easy.
As other Deibu gathered around Reimudas, they realized the threat from other clans in the forest who never likes them. They need to organize into a clan too.
No yukkuri want to be part of that clan though. Really understandable, the only rule is that the clan is dedicated to let Reimu type feel easy. Anything else came as least priority.
Patchouli types who think forward for the clan don't want to join the clan. Alice types who's crafty in making tools don't want to join the clan. The fast explorer Chen don't want to join the clan. Same thing with Myon types.
The only exception is Marisa types, but this is not because they want to. Marisa also got opressed by Reimu, but most of them are already binded in marriage with Reimu and they have children too. With this, Reimudas' Yuparta is born, a clan consisting of the ubiquitous Reimu and Marisa types (plus minority of other types happened to marry a Deibu).
When children are born, Reimudas gathered the children to teach them. The babies who look like Reimu are very easy, they can live easy like they already have. The babies who look like Marisa, go and hunt to let Reimu take it easy.
As for the minority of Alice, Patchouli, Chen or Myon types babies, they're uneasy and is thrown into a hole in the forest.
Marisa types had enough too. They want to take their Marisa children and leave this clan. When faced with the rebel, Reimudas sneakily praised Marisa as strong, so they can go out, but lets have a fight.
All the Deibu in the clan are very big and well nourished. Marisa in the clan are thin from hunting everyday and never eat enough. Easily they're overwhelmed.
In their berserked state, the Deibu starts eating paste from the fallen Marisa, inciting fear from the other Marisa. With this, the rebellion is crushed.
One day, a rumour spreads in the forest. An enemy from outside is coming. To defend themselves, the forest clans made an alliance to ward off the external enemy. A messenger also came to Yuparta who doesn't communicate much with the other clans. The forest needed every Yu they have.
Reimudas thought there's nothing more than rumour about the enemy. She accepted the alliance because she thought it can convenient later.
The day did come though. A Chen runs to Reimudas and sent the message. The forest calls for all clan to send their army. Reimudas is sunbathing, so she said her army will move tomorrow because it's already late and they could be attacked by Remirya in the night.
When they arrived, there's no more corpse, only splattered fillings and death stench filling the air. After knowing sweets sweets that's yukkuri filling, the Deibu is not repulsed by the death stench. They enjoyed the leftover paste, cream, custard, chocolate and an unknown filling with peculiar sweet taste.
Yuparta continued their easy life until one day, a mysterious yukkuri came. It has blonde hair, but is not Alice or Marisa. It has pointed ears, green eyes and first thing it says is "red ribbon, how envious"
Reimudas killed the uneasy yukkuri and recognized the filling as that very delicious sweets sweets from the battlefield. So there's such a great sweets sweets outside.
She gathered her army to attack. Reimudas lead her army. 200 Marisa armed with spear (stick) and 300 elite Reimu (read: evolved to Deibu).
When they reached the edge of the forest, they saw their enemy. It's a sea of golden hair, chanting "paru paru paru paru paru".
Reimudas is shocked, but still try to encourage her army. The enemy is a lot, but Reimudas' army is also a lot.
From human side, 300 Deibu against one million invader yukkuri from "Parseea", an impossible number.
Reimudas make use of the terrain in the forest. They formed a line at a crossroad and defend themselves from incoming wave. Being bigger and stronger, the Deibu easily kicked back the invader while Marisa finished them with their stick.
But the enemy never seems to end or feel any fear from seeing their comrades being killed and eaten by the Deibu. Their aim is only one, the enviable Reimu in front of their eyes.
Attacked by fatigue, one by one the Marisa is overwhelmed. Their hat and hair torn away by the envious Parsee army.
Seeing death, the Deibu army's morale is crushed.
Not only from the side, the road behind, their only way to escape, is suddenly blocked by army of invader wearing mask and without hair nor accessories like other yukkuri. Human might say they look like wearing pro wrestler's mask.
This is the "Immortals", their motto is "love dies but jealousy is immortal". The strongest army in Parseea is formed of 10 thousands yukkuri. If any member of the Immortal dies, another new member would take the mask, so their number stays the same.
Defeated, Reimudas dashed out of the forest path to escape. She decided to pull back when seeing her army is being destroyed.
But even here, she's surrounded by the Parsee. They're jealous of her ribbon, her hairs, her braids, her skin, her big body, her everything. They take those away from Reimudas.
"So, what do you think of it ?" A man asked his drinking friend.
"What's what ? You're clearly stealing from other's works."
The first man want to make a movie with yukkuri. They can get Deibu from the street, while the Parsee... that's a rare type, but they can copy the second man's Parsee pet and put it in the movie with CG.
Actually, he's inspired by the second man's dream about her pet (bodied) Alice being gang raped by army of muscled Carthago army. Not sure how that Carthago turns into Sparta though.
Under their feet, Parsee is telling them, she's jealous because they talk about other yukkuri even though Parsee is still there.