Evil is ruling the world, most of the human kingdom has been enslaved by dark forces and the remaining humans are defending with their last strength.
People create legends about ancient artifacts called “Onem”. It is said that you can control dark energy if you collect them all.
Rumor has it that this is just a soothing story. The witch Erina walks the ancient cliff where all the witches are said to have come from.
The old witch convinces her that the myth of “onem” is more than just a myth. On the way he will encounter many monsters and bad people… but the monster doesn’t think there is anything wrong with him.