In many classic movie scenes, time travel represents a long tunnel of time, sophisticated scientific research, crazy scientists, and of course interesting stories.

And in my setting, time travel is possible for everyone to do, as long as you do the right thing in the right place.

Explanation of several nouns.

The parallel universe, also known as parallel space or dimensional space, is a space different from the current time axis. I like to call it dimensional space.

We always like to ask what is outside the solar system, what is outside the Milky Way, what is outside the extra river galaxy, and whether there is an end to the universe...

We can make an assumption that all spaces are superimposed on layers, and each space is a universe.

For example, in the game, the Demon Refining Tower in Shushan has an independent space, and each floor has a teleportation point for teleporting to another space.

We can understand this way that there are many teleportation points on a certain planet or some planet in the dimensional space we belong to, and these teleportation points have different functions.

Some can teleport you to a planet in another layer of space, which is a space-level time travel, which means you have arrived in another universe.

Some of the planets that can teleport you on the same space, you are still in the same universe.

Some can teleport you to different time periods in the history of the same planet, such as back to ancient times, which is a time travel based on the same timeline.

The main difference is whether you can change history.

Each universe is a unique existence, and it continues according to the timeline and is an uninterrupted straight line.

In the same universe or the same dimension, as part of history, no matter which time you travel to, you cannot change the future history, because you are a part of history and everything you did in ancient times has happened.

This is dominated by the law of cause and effect, and there can only be the same law of cause and effect in the same universe.

The universe is an individual with conserved parts, like a sophisticated instrument, running strictly in accordance with the established procedures.

If you are teleported to another dimension, as an outsider, you do not have to abide by the rules of this universe, or your arrival destroys the rules of this universe, so history has changed on a planet in this universe.

The arrival of the time traveler destroyed this cosmic rule while also establishing new cosmic rules.

Time travelers who travel in each dimensional space are divided into two categories: one is participants and the other is bystanders.

Bystander refers to taking a bystander attitude towards new planets and new lives while shuttled through various dimensions, not intervening, and causing changes in the rules of the universe as small as possible.

Of course, since we have come to different dimensional spaces, as outsiders, we always have to cause changes in the rules of the universe, but this change is very small.

This is what most time travelers belong to, they understand the species origins, customs and habits of each universe, just like...sightseeing trips.

Participants are divided into active participation and passive participation.

For time travelers who do not understand the truth, they traveled to another dimension in a confused manner, passively involved in right and wrong, gradually changing the history of the local natives and becoming a hero who has been praised. Of course, there are very few lucky people, and most time travelers die in desperation.

Active participation is the time travelers actively take on the burden of changing history. This may be the attack of a heroic complex or encountering a beauty she likes, so she changes from a bystander to a participant’s role, and the ending is difficult to predict.

In every dimension, what we are circulated by us are the glorious deeds of successful people, and more losers have become the dust of history.

If the above assumption is true, then what does it look like when the infinite dimensional spaces we can freely travel through overlapping?

And what is outside of this infinite dimensional space?

If the universe is infinite, then the infinite number of universes are also infinite. So what is the definition of infinite?

Perhaps this infinite dimensional space is just a toy in the hand of a little girl in a family on a planet in a certain dimensional space...

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Note 1: The above is my own view of time and space. It is just a hypothesis based on personal speculation of TV and movies. It is just a fun one. In order to give this story a reasonable explanation.

Note 2: The popular term is now called "plane". I don't like it very much, but I prefer the concept of "dimensional space".

Note 3: There are four chapters in this unit, and there should be surprises if you add an ending.
Chapter completed!