Tale of the fallen Onmyoji

A story in a world where Yokai coexist.
In Hinomoto, a country that had chosen to coexist with Yokai, many incidents occur because of evil Yokai, but the existence of "Onmyoji" was the way to solve these problems.
However, a new "Curse" has been spreading...
Many Onmyoji have gathered to exorcise the "Curse" except the protagonist "Zen Kamono", due to being a member of a fallen onmyoji family.
While researching on his own, he discovers that a "kiss" is the most effective against the curse...!