I'm searching for a story, I can't remember the name of it. It is a mind control type story. In it, a woman transforms a prep school for wealthy boys into a girls school. The woman changes the boys into girls so that they can be married off and give up their inheritances. Each boy tries to resist the change but fails, and doesn't seem to have any memories of her past male existence. It might be the first story of a series, I'm not sure.

Does anybody know the title of this story? Thanks!