It's The Teachers, And Will Always Be The Teachers.

This is a fanfic where the plot is correct in each anime the main character goes into, but the main characters and the antagonist is made up by me, as long as some pasts, etc. Rikona Mitsuki is the main character with Takibi Kosuke. A slow romance, and a reason provided on why they are traveling through worlds (without they're consent). Only recommended if you have seen Bleach, My Hero Academia, and Toilet Bound Hanako kun. You can read the first book (Bleach), if you've seen Bleach but not MHA. If you've seen MHA but not TBHK (Toilet bound Hanako kun), then you can't read it because it won't make sense. If you think you can adapt to new things, you might be able to read it if you try. That's all, I hope you enjoy!