Revenant: Poison Master's Journey in Spirit Realm

There were six different realms apart from the human world. There was always far more than the eyes met and among those realms was the Kakurio, a realm of spirits where the yokai, Ayakashi, and ghosts coexisted.  Although this realm was connected to the human, no human had ever stepped into the land of Spirits.  Ito Asahi was the Heir to the Ito family. A renowned family of exorcists who were previously Onmyoji of the royal family back in the day. As the demons (Yokai) killed all his family members except for himself and his grandfather, they lived in a new place away from demons.  And yet, one cursed Monday, everything changed when Oni killed his grandfather. The Lust for revenge which had been held down now, arose like a volcano but how would he get to Kakurio…