Erin Gandharva is a demon king and for the last 1000 years has been guarding the fragile peace between the two races. As king he has had to spent endless years fighting heroes and keeping greedy kings in check. Tired of being an overlord in a small world, his life takes a weird turn when he is mistakenly summoned as a hero. Like a young child given a new toy, follow him as he micheviously brings chaos to this new world.