looks like a yukkuri is getting born backwards: this will likely result in it's demise (one way or another) - though we'd need the story to tell for sure
Anko2394: Awakened (with the meaning of realization) Reimu
Anon isn't a yukkuri lover or abyuser, but his interest is perked when a pregnant single mother with her child comes in making a home declaration. Instead of throwing them out, he distracts them by asking about the pregnancy, then offering to help.
Some time later, he's talking to the mother alone, finding out that her mate Marisa never came back, and comments that her mamu-mamu is loose, which may result in the child being born prematurely. Reimu doesn't want that, so Anon makes it narrower, saying it'll keep the ko inside.
In the meantime, Koreimu poops in front of the place, and Reimu lectures her to poop elsewhere or they can't take it easy. Koreimu says she'll do her best.
The next day, they wake up and look to Anon for breakfast. Anon feeds them, and Reimu spanks her child for eating too fast.
Then finally the time of birthing comes. Despite all of Reimu's pushing, the baby can't emerge through her mamu-mamu. Eventually she has to take a rest, but Koreimu isn't happy that she can't become a big sister and scolds her parent. Inside, the baby agrees with her elder sister.
Finally Reimu has had enough, she screams that she's sick of being pregnant and taking care of children, and begs Anon for help. Anon confirms with her that she doesn't want to get pregnant or give birth ever again, and she agrees, wanting to take it easy.
Anon pierces the baby's paste core with a needle, and it leaks out through the hole in the mother's body. The Koreimu goes berserk and calls her mother a yukkuri killer. Reimu thanks Anon, moved by the fact that he was the only one who was kind to her while her children betrayed her feelings.
Since then, Reimu and Anon are living together peacefully, but Reimu abyuses Koreimu, denying her food, destroying the ribbon, all the while enjoying it.
In the end, Anon cooks Koreimu, who begs her mother to save her, apologizing for the insults she said before. But Reimu tells the ko it's too late, and that she doesn't have a child like her.
Reimu has awakened; she seems to have gained a hobby of abyusing koyukkuris. Anon thinks he'll bring in some koyukkuris sometime for Reimu to enjoy herself, then wonders if he has awakened as well.