Occult science fiction shojo manga.
"Kamui's friends and family have been pulled into the deadly orbit of his destiny before - his motehr, who died to set him on his path; his aunt, who has also chosen death to provide Kamui with the weapon he will need in the struggle to come; and Kotori, gentle sweet Kotori, who has the power of the dreamseers to see the future... but from the future she sees, there is no escape."
"Kamui's friends and family have been pulled into the deadly orbit of his destiny before - his motehr, who died to set him on his path; his aunt, who has also chosen death to provide Kamui with the weapon he will need in the struggle to come; and Kotori, gentle sweet Kotori, who has the power of the dreamseers to see the future... but from the future she sees, there is no escape."