Kai-ri-Sei Million Arthur VR from Square Enix is already up on Japanese Steam, and according to the Steam page description, the game will feature in-app purchases. Apparently there will also be Korean, Chinese (Simplified) and Chinese (Traditional) support as well. It is unlikely you are able to access the Steam if you are outside of Japan.
Kai-ri-Sei Million Arthur VR is an all-new entry of the Million Arthur series, that’s hugely popular in Japan. This is a card-based strategy title with single player mode. At the moment, this title is only confirmed for the HTC Vive.
All of these details haven’t been formally announced yet, and that things may change as we head to the release of the game.