In the current era, a small percentage of people called "Special Abilities" have skills and powers normal humans do not possess. An autonomous organization, the Deviant Control Office, keeps these Special Abilities in check. Though some wish to maintain this order and peace, some wish to take advantage of their abilities and obtain more power in this world.

Ayumu Narumi's older brother Kiyotaka, a renowned detective and piano player, disappears all of a sudden. The only clue Narumi has, are the Blade Children. Two years later a row of murders and incidents begin, relating to the Blade Children. Together with school journalist, Hiyono Yuizaki, Narumi tries to figure out their destiny. (Source: ANN)

"I have a duty to see everything that happens. No matter how much pain and sadness there is... Because I am Spearhead's handler." recaps the story told in through the perspective of Vladilena "Lena" Milizé—the commander of Shinei Nouzen and the Spearhead Squadron. [Written by MAL Rewrite]

Third season of Yuuki Yuuna wa Yuusha de Aru.