Maou wo Taoshita Ore ni Matteita no wa, Sewazuki na Yome to no Ichaicha Renkin Seikatsu datta.

Isaiah, the hero who defeated the Demon King in the past, has been living alone, hiding the enormous amount of magical power he inherited from the Demon King. One day, Isaiah rescued an alchemist girl named Yomeria (Yome), who noticed his enormous magical power and asked him to live with her. She asks him to share his magical power with her, but the only way he can give it to her is through repeated skinship... "The only way to give away your magic is to repeat the process of skinship!?"