A Particularly Long Fast-Travel Novel, the Kind of "A Small World" with Forty or Fifty Chapters

I want to read a book like "Quick Time Travel: The Yandere Boss He's Fierce and Clingy". Don't be too emotional in a small world. Slowly watch and be moved by bit by bit. You can abuse but not too much. You can't accept the death of one of them. It's best to live in a small world until you grow old and have some fun.