Square Enix announced the release of the Yahoo! game, PC browser version of the Kairisei Million Arthur RPG game. The Yahoo edition will be available from 2016 October in Japan but the exactly day is unknown.

It should be noted that you can link the data with the smartphone version Kairisei Million Arthur which means you can play and continue where you left in the PC or the SP edition.
The game of course will be free to play and you can already pre-register for it from the official website of the game.