Gachi Koi Maou-sama

A hero undertakes the task of defeating the Demon Lord for the sake of world peace. When he arrives at the Demon Lord's castle, he is greeted by the Demon Lord with a marriage certificate in her hand! The hero is bewildered by the Demon Lord's strong appeal to marry him, but...? A love comedy about a die-hard-fan Demon Lord and an overly prickly hero whose world is in danger of extinction!