That pretty much sums it up. Yakumo lead a fairly typical student life, until Pai enters it. Pai is one of the last members of the immortal Sanjiyan, a race with immense powers and three eyes. When Yakumo is accidentally killed by one of Pai's spirit guides, Pai uses her powers and brings him back as an undead, unkillable being.
Mystic east feel, and monsters, and powerful immortals.
Not a bad combination. Volumes 5 and 6 pick up four years after the events in the original series. At the end of volume 4, Pai is subjected to something strange . In volume 5 it is learned that her memory was erased and she has been living a lie with an old couple who are under the control of the forces of evil. Yakumo finds Pai in this state and must convince her of her past.