This story is based on unreality. To put it simply... It is a spoof!
The main axis of the story revolves around an item. This item can be said to be a major invention in human history, and almost everyone can use it. You may think this item is vulgar, but you can't deny that you can't live without it!
The answer is revealed, this thing is the "toilet"!!!!
Can you imagine a secret agent traveling all over the world for a toilet? And causing bloodshed all over the world just for this toilet?
This is the hilarious adventure novel presented in this story!