The word "World" can be used in many ways, but is used most commonly to describe "a point of view".
[We shouldn't do this.]
Even so, if this "point of view" is suddenly damaged at a spiritual level inside the soul, it would change not only how someone perceives the reality around them, but also change that reality itself, sending him or her into another world entirely.
[Why shouldn't we? Didn't you say you wanted to help them? Here, let's use these creatures!]
This "point of view, sometimes known as a "central point", is the very core of the soul which is used to travel through dimensions and worlds. However, with the passage of time, the humans who once knew all there was to know about this "central point" have now forgotten everything and live their lives trapped in a single world, focused only on the third dimension.
[We have no more time. Is time to decide, now. Our world can't resist on its own.]
The ones who are still able to use this "central point" at will are called "Gods." And they can change the "central point" of other beings, whenever they wish.
[Ahahaha~! Too late!]
"What is this place...?"
"Wow~ this looks so cool~!"
"W-where am I? What is this place?!"
Thousands of people were summoned into another world. Each person's reaction varied wildly, but all of them knew one thing: they couldn't spare time for another. Survival became their utmost priority... With the exception of one young man.
"The mana is so rich here! And the power output is ridiculous! Ahahaha~ this place is a goldmine!"
A young man with no care for the mundane, with incredible abilities and knowledge from before this strange summoning. A man that created his own story and placed his own mark on this new world, surprising some Gods while angering others. Foolish and brave, confident and arrogant, with a gentle heart but with a spirit of a warrior.
This young man will stride forward, forging a new destiny in a world where anything is possible.