Protagonist: Yu Duanmujin
Supporting roles: System 714, System 107, everyone in the Space and Time Bureau
Yuu: I seem to have forgotten something.
Everyone: Oh, you scumbag.
Duanmu Jin: It's okay, I'll wait for you.
Nervous and unscrupulous maniac attack
The first world: primitive man x time-traveling woman
The second world: school bully x academic bully
The third world: E-sports master X new movie queen
The fourth world: the good-for-nothing prince x alien princess
...
I'm too lazy to write more about Buddhism.
Concept: Buddhist