When two police detectives get involved in their operation, the nurses of Mochizuki Hospital must wield their instruments - katana, machine gun, and pistol - with even greater precision to excise the cancerous Masaki. As each nurse uses her particular specialty to dispatch Masaki's thugs, Arashi pursues the root himself. Arashi may struggle with his piecemeal identity, but treating this human virus is something both sides of him are sure of.