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 Fuedal Underworld descends upon the living world.

In the 2501st year of the Glacier Calendar, the asteroid where the demons and the orcs survive flew to and hit the only continent on the phalanx - the fairy continent, known as the cataclysm in history. After the human ancestor Tianxing predicted the cataclysm with the Book of Prophecy, the two great powers, the demons and the spirits, joined all races to refine the seven-sacred artifact to fight against the collision and avoid the destruction of the world. The Fairy Continent was then torn apart and turned into seven seas and six regions. More than 300 years after the cataclysm, the demons gradually awakened and extended their minions to the Seven Seas and Six Regions... By chance, the two human teenagers obtained the Peerless Pearl among the Seven Gods Pearls, giving them the ability to The ability to summon each other. And the fate of mankind is about to be rewritten!

The desperate battle in Kamihama City continues to intensify. With Walpurgis Night changing course for Mitakihara City, all eyes shift toward Embryo Eve—an artificial being, currently dormant, that can allegedly liberate magical girls from their destinies. As the Wings of Magius grow dangerously close to executing their plan, Iroha Tamaki's last chance to stop the organization is quickly fading. Despite the dwindling odds, lingering hope for the dawn of a better future invigorates her final endeavor, while also uncovering memories of a story tampered with by the hands of fate.

In the near future, technology has made a few leaps and bounds, and videophones and constant wireless internet access are available to everyone. However, it would seen that the government has been careless and a skilled hacker was able to break into the national information archive. Using the data held there he creates the Platonic Chain website for people to discover information about themselves and their friends. Words start to spread quickly that there is a site that enables you to look up anything. Coincidentally, three young girls, Hitomi, Rika, and Kanae, are able to access the site.