After meeting an untimely fate at the hands of a murderer, Haruya Suketo finds that his soul has been selected to inhabit the henchman to the Devil King of the world of Exstrephia.

But this Devil King isn't the ominous, looming threat like he should be. He's more like an over-exiteable child!? And his servants are all total weirdos too!?

Thus begins Haruya's new life in this strange world. What are the Devil King's true goals? Is he more than he lets on? What will Haruya be forced to go through in his new position?