The scenery takes place in a private high school involving the concept of "saviors." They are known as people who possess awakened memories of their past lives. The story tells of a young boy named Moroha Haimura who comes to this private school. At the school, there are two types of people: Saviors, who fight enemies with weapons and techniques gleaned from the Puraana powers from their own bodies, and Kuroma, who wipe out enemies with magic to manipulate the Maana powers that surpass physics. Moroha Haimura is the first person with past lives of both Shirogane and Kuroma. Akane Academy is just like any other school...except the students just happen to be reincarnated heroes from a distant past who battled for the fate of the world. Now, monsters are threatening to wreak havoc, and it's up to the students of Akane Academy to stop them! Follow Moroha, Shizuno, and Satsuki as they navigate love, past lives, and kicking butt in this fanservice fantasy.