Shinkon Quest: Maou no Musume wa Majime Yuusha wo Duo to Shitai
The Newlywed Quest- The Demon King's Daughter Wants to Bed the Diligent Hero·シンコンクエスト 魔王の娘は真面目勇者を堕としたい♡
Harold, a descendant of the hero who defeated the Demon Lord, now lives a quiet life as a handyman in peaceful times. A discovered divine book foretells the world’s end unless a specific condition is met: the hero and the Demon Lord’s daughter must complete a "Marriage Quest." Harold is suddenly married to Yona, the Demon Lord’s daughter. Though hesitant, he finds her helpful with daily tasks and caring when he is tired. Yona, however, has her own hidden motives. She subtly encourages him to fulfill their marital duties.