Travel to HP from a world that is accustomed to time travel.
Change the fate, change the plot, and try not to brag or be negative.
The writing style is probably that of daily life, which is different from the world.
Since the author is too fussy, he is revising it again and again. It would be a good idea to save it and read it again when you get bored. If you find it too verbose, shut yourself up.
2022.10.19 Editor: I realized that I am not good at getting along with people, and I am not good at making jokes, so I can't write what I wanted at the beginning. So it was overhauled.
Intention: We should face it and grow up.