Granny’s House guarantees players’ ownership rights in the forms of FTs and NFTs via a blockchain. By ensuring these rights, data can be decentralized to establish an open ecosystem which enables compatibility with other universes. We anticipate connecting and bringing new value within Granny’s House to various types of NFT property owned by players. Also, we plan to make our API public, which is a necessary step to make NFTs created in Granny’s House maintain their value outside of Granny’s House. With this API, anyone can accept NFTs created in Granny’s House and assign a new value to them. By connecting outside NFTs to Granny’s House and our FTs and NFTs to other universes, we will create a cycle in which the lore of Granny’s House can expand beyond our universe. We believe that this is the process for establishing an open metaverse.