Akane Academy is just like any other school...except the students just happen to be reincarnated legendary heroes.

Akane Academy is just like any other school, except the students just happen to be reincarnated legendary heroes from a distant past who battled for the fate of the world. Now, evil 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.—Funimation

The story is set at a private school that brings together "Saviors" - students who have awakened memories of their past lives as Shirogane or Kuroma. Shirogane use weapons gleaned with Puraana from their bodies to fight enemies, while Kuroma use magic by manipulating Maana to banish their foes. Moroha Haimura has just enrolled into the private school and is the first Savior in history who has awakened memories of being both a Shirogane and Kuroma.—Crunchyroll