Well, since you're offering me experience points...
Anko653: No Change
Omitting the lengthy descriptions of nature and various models of vacuum cleaners, this is a story about a wild yukkuri couple being kidnapped from their nest hole by an eccentric Mister Human. He sticks a laproscopic camera into Reimu's belly and shows them their two unborn little ones on a monitor. Then he jams a vacuum cleaner nozzle into Reimu's mamumamu and kills the babies while the parents watch on the monitor. The fetal Reimu dies first, struggling as she's ripped open, emptied, and sucked into the nozzle that's smaller than she is. The commotion wakes up fetal Marisa, and Mister toys with her, chasing her around the womb with the nozzle. The nozzle finally catches Marisa's hair when she drops her hat and goes to get it back. Marisa fights to survive, clinging for dear life to the walls of the womb with her teeth, but in the end, she gets sucked up and killed, too, leaving her teeth embedded in the womb.
Afterwards, Mister taunts the parents by saying that since they didn't fight him harder, they must not have cared about their babies. He takes the lump of bean paste and baby parts out of the vacuum cleaner and holds it up to the parents, saying "Daddy, why didn't you save me? It hurt! I thought you'd save me!" in a squeaky voice. The parents are devastated.
Cut to some time later. A miniature Yuyuko is noisily eating. Mister developed this miniature Yuyuko on the pretext that she could be marketed as an eco-friendly vacuum cleaner, but she only turned out to be a small yukkuri with a high cost of feeding. Yuyuko asks Mister why he did that to those yukkuris, and he says it annoyed him that they were stupid enough to be pregnant in late fall and without much food stored for the winter. Whether it's yukkuris or humans, when stupid parents have children, everyone suffers, no matter how strong their love is. The babies were going to die anyway, so he thought he might as well have some fun with them. However, Mister then gave the parents some sweet-sweets and released them back into the wild, although it's still uncertain whether or not they'll survive the winter.