This is a short story solitaire written by three bored people in their own post forums.
I don't know what type this is, either.
All in all, it's a very strange and time-travel story.
The attributes are unknown, so it can be regarded as a guessing game.
You can guess which works are involved in each paragraph.
There are animations, novels, movies, ancient poems, etc.
I will post the answer separately.