The story revolves around William, an aristocratic family's progeny with rare intellect. One day, his uncle lost his possessions after his business failed. Fearing that his family's name has been tarnished, William returns home and searches with his family's butler for anything that can be converted into cash. A search of the premises yields an underground room left by an ancestor. In the room is a magical seal, and William unintentionally summons a devil. The summoned devil tells William his name Dantalion, and reveals that William is the designator who can choose the acting ruler of the demon world.
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(Source: Anime News Network)

Episode 1 - Pillar 1 - Devil and Realist

Episode 2 - Pillar 2 - Human and Angel

Episode 3 - Pillar 3 - Exorcist and Ghost

Episode 4 - Pillar 4 -An Old Love Story

Episode 5 - Pillar 5 - Mill and Flour

Episode 6 - Pillar 6 - The One Who Schemes

Episode 7 - Pillar 7 - Party and Battle

Episode 8 - Pillar 8 - Pain and Ecstasy

Episode 9 - Pillar 9 - Vice and Virginity

Episode 10 - Pillar 10 - Another Battle

Episode 11 - Pillar 11 - King and Ring

Episode 12 - Pillar 12 - Realist but Romanticist

Doga Kobo

Makai Ouji: devils and realist