GV Re: Boot 1.
Juan Sakurazaki, known as Gunvolt the armed blue vigilante, faces his nemesis Mytyl Kamizono the evil heir of Sumeragi. His ally is the escaped Sumeragi experiment Eros Lyze mk 3 who's power of life over death was abused by Sumeragi.
Together the totally not X and Zero ripoff fight off Mytyl's mercenary army and hamper her goal of profit at any life lost.