Natsune is a Regenerator, a human being born in a laboratory for one sole purpose: to provide an everlasting food supply for mankind's new overlords. Now, he's come to the facility where his mother was forced to give birth to him to strike vengeance against its monstrous masters. But he has drawn their ire by killing one of their own, and it's on the staff to take responsibility. Who will give their lives to appease the monsters?! Despair invites despair as the fight to survive rages on...