Ryo, Hayato, Takeshi, and Kei are Arms--people implanted with nanotech limbs that transform into grotesquely deformed out-of-control super weapons--and they seek to destroy the organization responsible for their plight.
Draws improvment: finally their neck doesn't look like a giraffe! Here we go with an another group of enemies: "X- we're better than cyborgs trashes - Army" (X-Men bad copy...) Some development in the story: meet the Bluemen