Takaya Ougi is an ordinary high school student who simply wishes to protect his best friend and lead a normal life. Nobutsuna Naoe, an older man, enters the picture and reveals to Takaya that he is actually the reincarnation of Lord Kagetora. Naoe, who is also a possessor, awakens Takaya's powers to exorcise evil spirits and battle the Feudal Underworld. Although most possessors recall their previous lives before reincarnation, Takaya does not. Naoe is grateful for this lack of memory, given his passionate and abusive history with Lord Kagetora. As Takaya hones his abilities, he starts to remember what Naoe did out of love for him. Meanwhile, the dark forces of the Hojo and Fuma clans launch their assault as the Feudal Underworld descends upon the living world.