Demon King Daimao by Crunchyroll - Dailymotion

Crunchyroll

Demon King Daimao (Ichiban Ushiro no Daimao) follows Akuto Sai as the lead character, who on the day he enters Constant Magic Academy, receives a very unexpected future occupation aptitude test result: “Devil King.” Weekly serials feature a circle of magical and fantastic characters around Sai vying for his attention and a broad spectrum story that details his destiny of becoming the Devil King.