Luchiru is a Majin who lives beneath the surface of the earth.
He was sent on the surface of the earth as a Spy who will gather information in order to defeat the humans who is living above it.
But the problem is "Majin's have a different understanding about Humans, they strongly believe that the Human Race are far more superior than Majin's in every sort of way, but in fact it is the other way around.
How would Luchiru survive in the Human World where he has different point of views on the strength of Human that he Strongly believe that just a touch would make him combust and be disintegrated in an instant?!