People are constantly fighting monsters, and these fights are very bloody. The hatred between humans and monsters is too great, but there are people who use monsters for their own benefit.

You are a hermit living among monsters, you have a special blood that allows you to understand and control monsters.

Ronald is just the man who wants to recruit you for himself. He stands with a machine gun in your house, having killed most of the monsters in the circle. "You think pitying monsters is wise?" he asked with a chuckle, watching a tiger with big black wings lurking behind your back. "Those mutants don't deserve pity, and you could be useful to humanity!"