Tap the 'GREE LOGIN' If you have a  GREE account already, please log in to your GREE account to start the game.

※ If you have started the game using a GREE account, you must log in to your GREE account to load and save your GREE account game data.
If you start a game without logging into your GREE account, it will create a separate new non GREE account and game file.

If you are unsure, please contact the Help page.