About me:
Mei and Min are sisters and shrine maidens of the Osaka family. Along with Chun(their pet), they guard the family shrine before they are cleansed in preparation for the Topaz Ritual in which a Kusbai is sacrificed to the gods in return for their protection of the village but there's a tome that says if the ritual fails one of the shrine maidens must sacrifice the other to appease the gods or else the entire village will be massacred by an insane woman in a bloodstained kimono.
