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
When Kagerou was a child, her parents sold her to be trained as an oiran in Yoshiwara. On her way there, she fell in love with the man who transported her, Ryuuji, and insisted that he be her first sexual customer when she grew up. Now, she is approaching the time when she will lose her virginity, but will Ryuuji be able to be her first?
2) Inazuma no Shou
Wakana works in Yoshiwara, but she plans to one day buy her own way out. She seduces presents out of the men who buy her, in order to save money for her future. But one man, Mitsunori, is not like all the others. Will the skilled seductress Wakana be able to cope with real emotion?
3) Mizu no Tsuki no Shou
Suigetsu is approaching the time when she's meant to lose her virginity. One day, she miraculously meets with a relative who knows her by her real name: Saya. Is it possible for her to be rescued from this life?
4) Nagasaki Bojou
Suigetsu, an oiran-in-training in Nagasaki, is slated to lose her virginity. However, she's been told she's going to have a Dutch man as a partner! She's frightened of sleeping with a foreigner who may not even speak her language! However, the man in question is nothing like she feared...