The Rising of New Great Power

Kai reincarnated to the anime world—just like a curse—being an anime character that has power which means an awful childhood—and a dead parent or just a single parent—saved by an organization called the History Compilation Committee and a girl named Sayanomiya Kaoru.
After finishing a lot of missions from her, Kai gets a mission to oversee Kouh Academy which were two big devil families Sitri and Gremory.
And the journey of Kai rising to the top started as he made his own group power to rival not only Three fanction, but other god and other supernatural being too—