In Tokyo in the near future, NOUNAI Senri joins RUOWA, a large pharmaceutical company, to cure his sister Mari's incurable disease, but his body becomes weak after he takes RUOWA Metal, a drug that turns his muscles into metal.
To find the last user of the drug, TAKAYAMA Eiki, he lures his daughter Ellie to the company, but he cannot kill her, as ordered by the director, and Senri tries to protect her.