anko3519: Lonely Reimu and the Patchouli who Lives in the Forest
Summary by Wrathkal:
A Reimu with a blue ribbon is born to a family in a clan, and grows up bullied and starved by the yukkuris around her for being uneasy scum, spared only because her death would smell.
One day, she ends up at a forest while escaping her siblings, where an uneasy yukkuri is said to live. However, a Patchouli with a carved wooden badge fixes up her wounds and feeds her.
Since then, Reimu sneaks away to visit Patchouli, who not only feeds her, but teaches her as well. Calling Patchouli her big sister, Reimu learns about many things, and about what humans can do. She promises not to approach the place where humans live as they're uneasy.
When winter draws near, the clan starts complaining about there being a lack of food. Then one yukkuri suggests it's because an uneasy yukkuri is hoarding them all. Realizing who they'll go after, Reimu escapes to warn Patchouli. However, Patchouli is old and can't move anymore.
Patchouli was previously a pet yukkuri to humans, well-loved by them. She wanted to improve human-yukkuri relationships, and decided to live with wild yukkuri in order to teach them. However, they refused to listen and cast her out, so she ended up living alone in the forest.
Patchouli gives Reimu her carved wooden badge and tells her to go to where the village is, having taught her before. The villagers will recognize the badge and see Reimu as a friend. Crying, Reimu asks one last favor... to call Patchouli her mother.
Later, after they've finished punishing the uneasy yukkuri, the clan realize that there's still no food. This time, they blame the humans, and set off to punish them. However, the humans are ready, and trap the yukkuri in nets. Reimu's family recognize her, and scream at her to help them.
Asking some questions about why the clan came, the villagers are enraged when they hear about how they killed Patchouli, and they start slaughtering the yukkuris, until only Reimu's family is left. When they hear that their fate is up to Reimu to decide, they immediately start apologizing and flattering Reimu.
Reimu rejects them as her family, since they killed her REAL family... her mother Patchouli, and tells them to die. The villagers kill them, and Reimu sheds a tear. Whether it's out of sadness from losing her only paste-related family, or the joy of having gotten her revenge, no one knows.