Foerza is the King of all devils who is cruel and cold, he promised a king that he would provide prosperity and protect his kingdom.

The pact had been carried out for years until the time when the empire was led by the great Duke, however, one day the Demon King was angry he wanted something more profitable for him, finally the Demon King asked you for a princess and an ordinary human to be his wife.

One day you two are married and you're in the Demon King's kingdom