This is hentai.
In 19th century Western Europe, a secret political group controlled high- ranking politicians by using highly trained prostitutes. The group disbanded after the ringleaders were arrested and Foster, the trainer of the prostitutes, wallowed in his misfortune. Now, years later, Foster receives an invitation from the railroad tycoon Dred to train young women to become high-class prostitutes once again.
One day at his favorite pub, Foster sees the voluptuous Isha playing cards with several gentlemen. It is lust at first sight for both Foster and Isha, and that night they let their passions ignite. The next day, Isha follows Foster back to the mansion and senses an unusual atmosphere there, and now, Isha becomes drawn into the world of discipline and bondage!