MUGEN FACTORY's Manga List

Satan, the strongest demon with black wings, was living a peaceful life in his own castle with his subordinates. One day, the hero Leonardo appears, and Satan is unable to protect his subordinates, eventually falling into a trap and being killed.However, Satan awakens to find himself reincarnated as a little succubus girl. While shocked by his new form, it seems Satan's immense power was carried over, making him strong from the start, even as a child.One day in the forest, he encounters Yulia, a young sorceress. Taken with the girl, who claims to be all alone, Satan agrees to travel with her, vowing to one day defeat the barbarous hero and create a world where humans and monsters can live in peace.This is a fantasy adventure story featuring the little succubus with the power of Satan and her cheerful companions.

One day, Racheli, the daughter of a fallen nobleman but a bright girl, is offered money by the king's aide to train the "king" at the castle as an educator. The poor Racheli is dazzled by the money and becomes the tutor of the current king, Gilles, who is a renowned tyrant.