In Yoshiwara (present-day Tokyo during the Edo Period), the laws against prostitution were abolished and brothels were restored in the red light district. We meet Kichou and his "princess" who are the top courtesans of the Men's Brothel Quarters at Hanafurirou...
Side Note: Cosplayed by Hana and Baozi
Mede Shireru Yoru No Junjou