You Keika, who unfortunately lost his life in a traffic accident, spends his days as Tanmoku Ki's spirit shadow. Then, one day, upon realizing that he has not really received any particular training as spirit shadow, Keika tells Ki that he wishes to train. Heeding his request, Ki leaves Keika's training in the hands of In Tetsu, lord of the Tanmoku family's Mt. Ura. As Keika's training gets off to a rocky start a mysterious youkai appears.
He is a Youmeishi who maintains the 
balance between light and darkness,
Er ist ein Yomeishi, der Licht und Schatten
in Balance hält. Ich bin sein Schattengeist.
Es un Youmeishi
que equilibra luz y oscuridad,
Es un Youmeishi
que equilibra luz y oscuridad,
gardien de l’équilibre
entre l’ombre et la lumière,
È uno Youmeishi che mantiene l'equilibrio 
fra la luce e le tenebre,
Ele é um Yomeishi que mantém
o equilíbrio entre luz e sombras