Maou-sama to Kekkon shitai

One day, the Demon Queen saves Haru, a young human boy about to be sold as a slave, and takes him back to be her attendant. Some years later, the bored demon queen asks our now fully grown and handsome Haru what else she has left to do. <br> "Marriage," Haru replies. <br> Thus, a heart-pounding romcom between an innocent demon queen and her servant unfolds.