From Aerandria Scans:

The young and eccentric writer Amazawa Yamabuki is the newest resident of a secluded mountain where only ghosts dwelt before he came. He is set on renewing the ritual of “repaying the mountain” which his ancestors abandoned and on exploring the area. For this, he requests the help of the greatest ruffian in the whole mountain, Kaname, who also happens to be the guardian spirit of the sacred sword that the Amazawa family had been enshrining and honoring for centuries…