Maou-Sama to KekkonshitaiMaou-sama to Kekkon shitai; I Want to Marry the Demon Queen; I Want to Marry the Devil; Maou-sama to Kekkonshitai; Quiero casarme con una reina demonio; Замужество Владыки демонов; 魔王様と結婚したい; 마왕님과 결혼하고파; 想和魔王大人結婚; Я хочу одружитися з королевою демонів
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. "Marriage", Haru replies.
And thus, a heart-pounding romcom between an innocent demon queen and her servant unfolds.
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Raw - https://comic-meteor.jp/maou/
Pixiv - https://www.pixiv.net/member.php?id=9675329 (Atrs + Another stories same universe)