Infinite parallel spaces replace the original protagonist in each space. Each space has a unique protagonist. All the rules revolve around the protagonist, and everything exists for him.
A person who accidentally traveled through time can continuously travel through different parallel spaces, become the protagonist of countless parallel spaces, and become the center around which all rules surround.
Now that he has become the protagonist, what choice will he make?
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.