Abe Akiharu is a high school student who has no time to enjoy his youth because he is busy helping out at the family business of a shrine.

One day, while holding the pentagram birthmark he was born with, he chants a spell his late mother taught him...and ends up summoning the demon king Satan!!

He signs a contract to help with housework in exchange for handing over the "power of the 'son of God'" (?), but Satan, who has no ability to live on his own, ends up pushing him around and asking for a deep kiss to "replenish his magical powers"!?

A high school student who is the descendant of an onmyouji and an innocent demon king with a dynamite body, a forced contract and living together love☆