Mercenary adventurer Theo Aspel is tragically weak, leaving him no choice but to repeatedly joins various parties - only to get kicked out. In order to get stronger, he succeeds at summoning a demon that will grant him a wish. But the minute he sees her, his wish to get stronger flies straight out the window. This devil, who hadn''t been summoned in many years declares: ''I will grant your wish, but you must give me something precious to you.'' Theo stutters out a reply: ''W-will you marry me?'' The devil is stunned to say the least, but grants his wish, making them husband and wife. They embark on a happy married life together, causing quite a stir around them along the way. This is a story of a boy and a girl that''s a just a tiny smidge dirty.