Thread: What is the name of the following hentai animation?

It involves a princess, whose brother takes control of the kingdom by force. At one point he threatens to have the palace guard slaughtered, but the princess intervenes and he provides her with a task, which, if she completes it, will save the guards' lives. There is also a strong fantasy element to the story with the princess encountering a number of weird beasts. Any suggestions?

Hentai...*snickers*