Why Shouldnt a Detestable Demon Lord Fall in Love

This is the story of a detestable Demon Lord and his wonderful new wife a destitute damsel
Our Demon Lord Anima is the strongest in all the world feared by the denizens of the realm Hes forced to spend his days in solitude until completely out of the blue he gets summoned to another world The one who summons him is none other than Luina an exceedingly poor girl who runs an orphanage The two of them quickly fall in love with Anima swearing to use his power to protect his newfound family