The Grim Reaper

This book is closely connected to tarot cards.

Each dimension is equivalent to a tarot deck.

The spirit of a tarot card is the ruler of that dimension.

But what if, by some fluke, the ruler of the dimension you end up in after death is your junior schoolmate?

It's fine. Once you become a ruler, you naturally forget everything.

Wishful thinking.

Death doesn't remember him.

Theme: The end of the world is the beginning