This is a city stray clan. Their chief Patchouli has a rule, never make contact with human.
One day, five Koyukkuri are playing hide and seek. Alice, Chen, Patchouli and Marisa will hide while Reimu will seek for them.
One! Two! A lot!
One! Two! A lot! A lot! A lot!
Reimu found Patchouli. Alice and Chen came out because Reimu can't find them. The only one left is Marisa who hide inside a pile of fallen leaves and fallen asleep.
When Marisa woke up, none of her friend can see her. They can hear her voice, but can't see her.
Seems that the leaves and twigs sticking to Marisa's body and hat acts like Reimu type's barrier, making her invisible (to other yukkuri).
Marisa is excited by her new ability, although she and her friend don't know how it works. Now, Marisa want to surprise her family and left.
Her three friends got crushed by a human disturbed by their noise. Patchouli vomitted her filling and died.
Back at home, Marisa's father realized her little one is doing Silently Silently in the corner. Marisa's mother, probably for being Reimu type, soon realize the situation. Little One want to be invisible with barrier and surprise them. As kind parents, they will play along.
Later, Mother Reimu explained that the barrier makes Marisa invisible. But she missed the part explaining that the barrier is not perfect yet because adults can easily see through the barrier. Only the immature koyukkuri and baby yukkuri's perception is affected.
Without knowing that, Marisa tried another prank. This time, she will try it with human.
First is a test to confirm if it works on human or not. After attaching a new barrier (her mother took off her previous barrier last night). Marisa approached a girl who's eating soft cream on the bench.
Supposedly the girl will look disgustingly at the yukkuri with leaves and twigs sticking on her body.
But this girl realized the situation and decided she want to play along. She pretended to be surprised and dropped her sweets before running away.
Actually, Marisa's parents are ready to let go of their child to die. But seeing Marisa succeeded, not Reimu suggested they use this method to make human take it easy forever and take the sweets sweets.
Today, the family will try to kill a man eating his lunch. This man is in bad mood because he got called to work when he should be resting.
Yesterday he had just crushed some noisy yukkuri (Marisa's friends), and today another group came to him. Does yukkuri always live to bother human like this ?
He's surprised with what the yukkuri is trying to do. But since they got fired up and starts talking as they like, he kicked Father Marisa away. Mother Reimu demand him to say sorry and give his food (he's not sure which is more important to Reimu, her husband or the food).
He demanded them telling what they're trying to do. If they answer sincerely, he will give them sweets sweets. Of course, hearing them want to kill him, he kicked them away; why should he ask for forgiveness from those who wanted to kill him anyway ?
He asked Father Marisa (recovered a bit) who planned this. Both Marisa confirmed it's Reimu's plan to surprise human to death and take the sweets sweets.
So he offer them a choice. One parent should die.
Reimu quickly say Marisa should die instead of Reimu. Not "instead of us (Reimu and KoMarisa)" but "instead of Reimu".
The man asked Father Marisa's opinion after hearing her own wife told him to die.
The family fall into argument. They're so into it, they already don't care about the human who's about to execute them anymore.
Tired of this, he crushed Marisa. It's purely random choice. Reimu is fine too, but he just picked Marisa.
Reimu is still not satisfied. She crushed her own daughter. But because of the previous damage, her feet breaks from the excessive jump and she almost died from paste lost. That's when the chief Patchouli arrived.
Due to concern that Reimu will die before telling the reason, they can't interrogate Reimu by inflicting pain. Realizing this, Reimu thought she had an advantage.
That's until the girl from yesterday came to tell Patchouli. She told everything, from how KoMarisa used barrier to attack her, until when Reimu killed her own daughter.
Reimu is in panic. After Patchouli heard the truth, she will surely be executed.
The girl know yukkuri hate to kill their own kind, so she kicked Reimu who's yelling at her. She asked Patchouli to at least clean up the mess and leave the park.