A hard-working Hero and a sexy demon girl marries to avoid the catastrophe...A sexy Isekai love comedy! Harol, grandson of the Hero who defeated the Demon King, lived as a handyman in a small village. He followed his grandfather's words and lived as a hero...a compassionate, perfect person who selflessly serves others. However, when the Divine Book was discovered and it told that the world is close to destruction, he was called by the King. As the book told that in order to avoid the tragedy, Harol must marry Yonayona, the Demon King's daughter and complete the "Newlywed Quest"! They need to experience things that a normal couple would do after marriage. After he started to live with Yonayona, he became more and more attracted to her. She is sweet, gentle, and sexy. But she had other side of her...that loves to do dirty things!