Seiken Tsukai no World Break

A private high school gathers students who have awakened memories of past lives. These students are divided into two groups: Shirogane, who use weapons and abilities derived from their own Prana energy to fight enemies, and Kuroma, who defeat foes using magic that manipulates Mana, a force beyond physical laws. A new student, Moroha Haimura, joins the school. He is unique as the first individual to have past-life memories of both Shirogane and Kuroma.