Due to in-game transactions being declined by Google, you are currently unable to purchase items through PlayStore in the game. We are sorry for the inconvenience caused.

Now, we have opened the way to purchase in-game items with Knot. As long as your game version is upgraded to the specified version (android 1.1.2.5 and above, iOS 1.1.2.4 and above), you can use Knot to make in-app purchases.