Mirage of Blaze

Mirage of Blaze (炎の蜃気楼 (ミラージュ), Honō no Mirāju) is a Japanese light novel series written by Mizuna Kuwabara, which are published under Shueisha's Cobalt label from 1990 to 2004. It was partially adapted into an anime television series directed by Susumu Kudo in 2002 and an OVA directed by Fumie Muroi in 2004, where both have been released in North America by Media Blasters,

Plot
Takaya Ougi is just a typical high school guy who wants nothing more than to protect his best friend and live a normal life. Enter Nobutsuna Naoe, an older man who informs Takaya that he is, in fact, the reincarnation of Lord Kagetora. Naoe, himself a possessor, awakens Takaya's abilities to exorcise evil spirits and fight the Fuedal Underworld. While most possessors remember their former lives before being reincarnated, Takaya does not. Naoe is thankful for this, considering his passionate and abusive past with his Lord Kagetora. As Takaya improves his abilities, he also begins to remember what Naoe did because of his love for him. Meanwhile, the dark forces of the Hojo and Fuma clans begin their attack as the Feudal Underworld descends upon the living world.