In this world, there exist demon swords. Those who have the sword will have their will taken over, and they will lust for human blood and keep on killing indiscriminately. The sealer is who searches for those blades that haunt people and seal them with his scabbard.

Naomi sacrificed her own youth to raise her daughter Yuriko. After Yuriko graduated from school Naomi moves out into the world to catch up on her own youth. Some time later Yuriko receives a message telling her that something happenend to her mother. She goes on the search for Naomi only to find her in the hands of a gang of rapists.