Mouryou no Nie  

Mouryou`s Sacrifice, 망량의 제물, 魍魎の贄

In ancient times, a conflict between mankind and beasts took place. Despite their defeat, people managed to imprison these creatures in mountainous regions. Nowadays, Hayato, Chihiro, and Suzuna dedicate themselves daily to combating malevolent monsters and keeping them contained. Although they are also monsters, they seek harmony with humans. One day, they learn that the beasts sealed away centuries ago are set to resurface. In order to prevent this from happening, they decide to journey to the source of the problem.