If you are summoned to another world as a Hero to fulfill the Prophecy, or as the Chosen One to defeat the Demon King, it is a lot of problems and adventures. If you are sent to another world Great Entity, giving no less Great Mission, then the problems and adventures will be no less. If this Great Entity sends you to the other world with capabilities close to absolute, not with a great purpose, but just for fun - there will be so many problems and adventures that you may not be able to carry them away.

But the darkest darkness begins when it is NOT YOU who should have been sent to the other world with or without a purpose.

Translation of the original novel
https://ficbook.net/readfic/018d3ad2-5736-7ded-aaab-9121c62b27c5/36608267#part_content