In fact, it is what happened when a Cullom skeleton before the pseudo-sixth reincarnation went from his own world (not the world of tutoring) to perform a mission after the Space and Time Bureau...
The most written ones are probably about tutoring, after all, from the first generation to the tenth generation...
The heroine is not a Mary Sue, and she is not loved by everyone.
Not powerful, but not useless either.
He was killed by someone he trusted, more than once.
When I got the happiness I wanted, I lost it again.
Well, in the early stage it was just a small cup.
In the middle and late stages, it is a happy little washing utensil.
Happiness will come back because mom is dear to you.