Kakuriyo -Bed & Breakfast for Spirits- (2018)

S01E20 Traces of a Dream in the Dragon Palace

Aoi sets out to locate the mermaid scale and ventures to the cursed ruins of the dragon palace alongside her master. While both of them remain unaffected by the miasma surrounding the area, Aoi becomes distracted by a mysterious voice that beckons her name, leading to their separation.