Zettai★Maou ~Boku no Mune-kyun Gakuen Saga~

One morning, protagonist's parents suddenly informs him that they are actually an ex-king of demons (maou) and a heroine. As a candidate for the next demon king, protagonist gets transferred into another school... located in the demon world. Except for him, all of the students in his new class are girls. His new school life as a demon king candidate begins...