Tokyo in the Near Future.
NOUNAI Senri joins the big pharmaceutical company RUOWA to cure his sister Mari's incurable disease, but his body becomes weak after taking RUOWA Metal, a medicine that makes muscles look like metal.
On the orders of the company, which did not want this side effect to be publicized, he ended up killing people who were suffering from the same side effect!
Will he be able to inform the public of this side effect?