Tokyo in the near future.
NOUNAI Senri's older sister Mari is suffering from a rare disease that prevents her from walking. He joins the pharmaceutical company RUOWA in the hope of finding a cure for his sister, but there he comes across a medicine that turns muscles into metal, and he suffers from its side effects. NOUNAI Senri ended up working to kill people suffering from the same side effects. In the end, he was able to successfully publicize the side effects, but he himself quit the company. Six months after he quit, the large company RUOWA fell into the Shitamachi district.
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