Abe Seimei is a freshman in middle school. He has an uncle named Yuka Tamamo whom he calls Tamamo Mae, and a pet Xiaobai who is a fox with two tails for some reason.
He originally thought that he had the same name as the famous Onmyoji Abe Seimei in history. Until that day, when the time of encountering evil came, the gap between the Yin and Yang worlds opened, and the legendary evil god Yamata no Orochi appeared...
Timeline: Modern, the background of yys is described in the order from the eldest brother (yys's original family) to the sixth brother (codename: The World) and then to the fifth sister (codename: OIP).
But it's a comprehensive comic, and it's a world (modern) fusion setting.
The little flower fairy next door will show up.
Concept: The follow-up to "Little Flower Fairy" next door