Follow the journey of a single, young teenage boy who lives his life on the battlefield, possessing a cold, unrelenting fury toward the superpowered world. Let it begin with a storm of bullets and blood as a boy who is feared as the famed mercenary and killer, codenamed "Zero." Reworked series of "MHA: Parabellum" And Four-Parts story of "A Hero with a Bullet."

John D. Magnus, aka Strife, a world-famous vigilante known to possess unparalleled military and technological might that is widely feared and respected in a world of superpowers. Along the way, John's mysterious past would involve a certain green-haired Japanese teenager. One of which involved he had already killed him once, and now saving him from his tragic fate.