As a demon king with a terrible reputation that shakes the three realms, Reginald has long been accustomed to being surrounded by fear and hatred.
Until he found his destined enemy according to the prophecy - a slime that was trying to stuff itself into a fruit core as a dwelling.
"Stop! Don't lick my armor! Don't look at me like that!"
"Guji?" (Translation: Hello, do you want to bask in the sun together?)
He vowed to personally deal with this strange "natural enemy", but when the slime happily jumped on his head as a hat, the destruction spell got stuck for the first time...
Concept: They should not have crossed paths but unexpectedly met.