I Asked You to Raise a Spiritual Pet, but You Actually Raised a Ferocious Beast?

Beast controlDecisive killingDevelopment This is an era where all people control beasts and demons are rampant. Demons have terrifying power and feed on humans. In order to resist the demons, humans built walls and hid in a corner. Occasionally, a human being signed a contract with a spiritual beast, possessing the ability of the spiritual beast, and gaining the power of the same source as the enemy and ourselves. This shocked the world, and then other countries followed suit. Thus, a new era begins, this era is called the era of beast control!