Kakuriyo -Bed & Breakfast for Spirits- (2018)

S1E9 An Elderly Ayakashi Couple's Wedding Anniversary

In the shadowy confines where Aoi is trapped, the sound of rain and thunder brings back memories of the day her mother abandoned her. As she begins to fade away, the master arrives just in time to save her. When she regains consciousness, she discovers that it’s already the anniversary of the royal couple.