Giant Beasts of Ars

Former nagimori Jiiro, a veteran of the wars against giant beasts in the world of Ars, is struggling to cope with the loss of his war partner. His routine is disrupted by Kuumi, a young woman who has recently awakened to her uncontrollable magical powers. She escapes from the Mezami research facility's underlings and forms a contract with Jiiro to save a city from a giant beast attack.