Kagerou Inazuma Mizu no Tsuki

A collection of stories set amongst the oiran (high-rank courtesans before the time of geisha) in (mostly) the Yoshiwara district of Edo, a famous historical 'red-light district.'
1. Kagerou no Shou
2. Inazuma no Shou
3. Mizu no Tsuki no Shou
4. Nagasaki Bojou