Natsuki and Batanen are two semi-human bounty hunters--she's part cat and he's part wolf. Together, they race the police to apprehend a reptilian creature that threatens to devour humans. When Batanen is injured, Natsuki is assigned a new partner.

Sakura is a growing Nine-Tail Fox who is still missing her ninth tail. In order to become complete, she makes a plan to get close to Natsuki.

There will be full moon soon. The Nine-Tail Fox Sakura needs a mithril tip bullet, but will she use it on a monster or her bounty-hunting partner Natsuki?