Kuchikake Ryuu no Keiyakusha

Yao is a 16-year-old who inherited an antique shop from his grandmother and works as an exorcist. He deals with "koware," antiques that have developed souls through long-term care but have become corrupted and dangerous. In the past, a koware containing a powerful spirit attacked him, leaving his sister Meilin in a coma and halting her aging at 12. Yao has since sought the koware responsible, hoping to find a way to wake her. After being attacked by another koware and nearly dying, he is saved by a large dragon possessing ancient abilities. Yao questions the dragon’s origins and what their meeting might mean for his mission.