Maoyū Maō Yūsha (まおゆう魔王勇者, lit. Demon King and Hero), also known as Maoyu, or Archenemy and Hero in English, is a Japanese light novel series by Mamare Touno that was initially posted in a play format on the textboard 2channel in 2009. Enterbrain published five main novels in the series, in addition to three side-story novels between 2010 and 2012, selling over 450,000 copies in total. It has received several manga adaptations.