During a morning of bliss, Kū in the midst of a quest to understand the depths of Setsuna's emotions. Battle preparations are drawn up in anticipation of the threat of Batraz and Kyoshiro decides to bring Kū to his old academy.
Kuu attends school in the city of learning, Academia. She soon finds herself locked in conflict with the Absolute Angels: a group of beautiful girls who feed on human life force to survive. Wielding god-like strength, they have the power to destroy the world itself. But are they truly demons of destruction or simply innocent girls trapped in a fate they can’t escape?