anko3469: By Chance
Summary by Wrathkal:
A typical yukkuri family of four (Marisa, mammalian pregnancy Reimu, Komarisa, Koreimu) target a human they saw coming out of a convenience store, stopping him next to a rubbish dump point.
When he hears them demanding that he hand the food in his plastic bag over, he takes out a piece of bread, having decided to eat it in front of them instead of doing so at home. But he suddenly drops it, and the family rushes for the bread. The Koreimu takes the first bite.
She immediately goes into shock and starts throwing up her paste, because it's a curry bun. They blame Anon for feeding her the bread, not listening when he says he didn't do anything. Marisa tries to attack, but he just keeps dodging, not wanting to get dirtied, and tells Marisa she better stop. Ignoring his words, Marisa jumps...
And Anon dodges, revealing Komarisa at the end of that trajectory, and the koyukkuri receives a critical injury. Marisa apologizes to her screaming child, and blames Anon for that again. She tries to attack, but when she misses this time, she goes into the pile of rubbish bags.
Immediately, Marisa starts screaming, because somebody left a beer bottle there, and now the glass shards are ripping her up. When asked if she's not going to help Marisa, Reimu says she's a mother, and that it's dangerous. Anon notes that she abandons others for herself, and Reimu goes to help Marisa.
But as she's nearing Marisa, Reimu goes into convulsions, the child within is being born. She screams at Marisa to catch the child, but Marisa can't move due to her injury. The child, a baby Reimu, is launched, and she crashes into Marisa, sending both of them onto the sharp remains of the broken bottle.
Reimu moves to help, but trips and falls onto more fragments, cutting her belly. A baby Marisa, her second child, screams inside, and starts trashing around, hurting Reimu. On the other end, Marisa's paste core has been damaged, and she won't ever be the same again, while baby Reimu had a fragment stabbed into her right eye, and is wailing her incomprehension of the situation.
Anon comments that all this happened in a few minutes. Hearing his voice, Reimu immediately blames him for everything. Anon sighs and asks if he can say one thing.
"What did I do to you?"
Initially raging, Reimu realizes that the answers to his follow up questions are the ones she doesn't want to accept.
"Why did Koreimu eat the curry bun?"
"That's because geezer dropped... yu?"
"Why was Komarisa hurt?"
"Because geezer dodged Marisa's... yu!?"
"Why did Marisa get hurt?"
"Yu... Marisa hit the rubbish bags..."
"Why did Reimu hit Marisa with the baby yukkuri?"
"Be-because Reimu can't move."
"And why are you lying down now?"
Anon reminds Reimu that he did tell them to stop many times, but they didn't listen, so it's simply reaping what they sowed. Reimu refuses to believe it, and continues to blame him. Anon suggests a different explanation: no one was at fault, they just had bad luck. That way, they don't have to blame anyone. With that, Anon bids Reimu farewell, and leaves.
All that's left there is the messed up state of a yukkuri family. Nearby, a poster reveals that workers from the factory would eventually have come and put an end to the family's yu-life. They were lucky to have lived up until now, but there is only one reason they ended up like this.
Their luck happened to be bad today by chance. That was all.