Based on the game by Lune.
This is the sequel to Ride of the Valkyries 2.
Imprisoned deep within Duke's castle are three of the revered goddesses known as Valkyries. Their names are Reia, Ariya, and Hildegard. After being captured by the demon king's army, they have been assaulted unceasingly. Their wills and sanity broken, they are now slaves to physical pleasure.