Saya's note: this one is also a story I translated a long time ago and hadn't bother to publish until now... Well, well, I hope you enjoy it!
My friend S once had a pet squirrel when he was at primary school. He adored it and looked after it well, but one day while he was out the squirrel apparently managed to open the cage on its own and escaped.
He searched every room in his house but couldn't find it.
He lived on the fifth floor of an apartment block. Maybe his squirrel fell from the balcony and died? He went outside and searched the ground below the balcony, but found no dead body of a squirrel or other such things. He then returned home and searched more but it was useless.
He wondered if his squirrel fell from the balcony but somehow managed to survive and ran away. For the next week or so he looked everywhere, both inside and outside home, but it seemed his squirrel was lost for good.
He was on the verge of giving up when one day he found a large envelope inside the post. Usually all mails for the residents would be put in the post boxes in the ground floor hall, so the fact that there was an envelope inside his house's post box meant that someone had brought it in person. S was curious and opened the envelope immediately.
And what he found inside - and it was the only thing in it - was a bushy tail of a squirrel...
And S was quite sure that the tail belonged to his squirrel. Who did this? Was it someone from the neighbourhood? Why was there only the tail in the envelope? What happened to the rest of the body? How did the person who gave him the envelope know that the squirrel belonged to him?
S never found out the answers. All he could do was cry and bury the tail.