Isn't It Only Reasonable for the Demon King to Summon a Hero to Defeat the Demon King?

[One heroine + a must-read for pure romance fans + mild natural disasters]

This book could also be called The Demon King’s Notes on Killing Demons.

Pilt became a demon king, the lowest-ranking kind. The other demon kings looked down on him.

He simply looked too much like a human.

As a result, most humans had no idea he was a demon king.

One day, he performed a summoning ritual. The one he summoned was a hero from Earth, or, to put it another way, a fellow countryman…