Makai Ouji: Devils and Realist - S01

Seventeen-year-old William Twining takes pride in his bloodline and in his devotion to modern science. When he finds out his family has gone bankrupt, the arrogant noble must face the fact that he can no longer pay for his tuition or the life he is used to. Searching his manor for anything valuable, William stumbles on a hidden room and accidentally summons the arrogant demon Dantalion, the Grand Duke of Hell. Apparently, Lucifer, the ruler of Hell, has fallen into a deep sleep. With him gone, only the human "Elector" can choose a temporary successor, which stirs tension among demonkind. Though he is told he is a direct descendant of King Solomon and holds unshakable authority in the underworld, William refuses to believe it. Denying magic and the supernatural entirely, the defiant realist does not realize he stands at the center of the ongoing battle between Heaven and Hell.