Sonnet is a cyborg/esper from a harsh background and now trained to be the ultimate warrior and most powerful weapon in the world. She is sent to Japan to watch Komatsuzaki Lan, who is thought to be controlled by the rage of the esper Akai Kiba (Crimson Fang). Lan is a quiet girl who knows she`s different from everybody else and starts to show signs of Crimson Fang after comming into contact with Sonnet. In the course of fighting with Lan, Sonnet starts to rediscover her humanity. At the same time Lan has to fight to retain her humanity and control the Crimson Fang.

Antoinette is an android of burnished chrome created by the altruistic Dr. Watson specifically to coexist with humans. On their peaceful planet, Imperial Governor Proud seeks an ancient technology that could threaten all organic life. The human resistance sparks unexpected empathy in Antoinette, setting her on a collision course with the governor’s cruel ambition.