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.