Kuruma Shinichi

The mage Byodo is the king of another world. In order to reduce his immense power, Riki Hyodo, an ordinary high school student, exists in this world as an alter ego. Byodo, who traveled through the dimension and came to this world, tries to assimilate with Hyodo and absorb his power, but instead he is absorbed by Hyodo. He exterminates the evil fairy that Byodo used to cross the dimension and is scattered all over the place, meets the mage Toshihiro Yuki of the present world, and the executioner Zanju who protects the order of the universe and the fanatic Balma that he continues to pursue. At the end of the battle, Hyodo once again throws himself into an internal battle with Byodo.

It is 1st of 4th manga, based on the novel Yamigarishi by YUMEMAKURA Baku