Ao no FūinAo no Fūin.

Ao no Fūin (蒼の封印; literally "Blue Seal") is a Japanese shōjo manga series by Chie Shinohara which was serialized in the manga magazine Shōjo Comic from issue 22 in 1991 until 1994. The story is about a beautiful high school girl, Sōko Kiryū, who finds out she is the latest reincarnation of Sōryū (usually called "Seiryū"), the demon queen who once ruled the earth with her demon armies. Unfortunately, she has fallen in love with a boy named Akira who is the reincarnation of Byakko, the legendary white tiger who is destined to kill her.