The basic story of Muramasa has you playing as two very different sword wielders and you can switch between the two stories whenever you feel like it. You can play as Momohime, a princess who has been possessed by a dark spirit and will do what it takes to get her soul back where it belongs. Or, you can play as Kisuke, who has lost his memories and is a fugitive accused of a crime he doesn't recall committing.
I've been meaning to get Muramasa for a while. Traded in my uplayed Wii copy the moment I learned of the Vita port.
Been waiting for a price drop, though. Been spending way too much money on gaming this summer, between the Steam sale and all the late July/August releases.