This is a card-based VR title exclusive for the HTC Vive. Kai-ri-Sei Million Arthur VR is not a port of the mobile/Playstation Vita/Playstation 4 version. It is a brand new, unique standalone title that is build from the ground up for virtual reality, featuring immersive virtual environment in the game world. Player will be engaging card battle against high definition 3D bosses, as well as interacting with popular characters in the game.
According to the official site (which also contain screenshots), this game cost 3980 yen. Hopefully Square Enix will bring it to the rest of the world in the future.