In the dark place where Aoi is locked up, the noise of rain and thunder reminds her of the day her mother left her. As she loses consciousness, she's rescued by the master; however, when she wakes up, it's already the royal couple's anniversary day.

While the master is away, Hatori and Tokihiko, the front desk manager and bath caretaker from Tenjin-ya's rival inn Orio-ya, suddenly show up at Tenjin-ya. Although they say they came as guests, a tense mood prevails among the employees.