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.<br><br>Some years later, the bored demon queen asks our now fully grown and handsome Haru what else she has left to do. “Marriage”, Haru replies.<br><br>And thus, a heart-pounding romcom between an innocent demon queen and her servant unfolds.