OC often stands for "Original Character" in various creative communities, and "Graceful Smiles" could be a name or a concept related to a character, story, artwork, or something else entirely. Could you please provide more context or information about what you're talking about? This will help me give you a more accurate response.

It seems like "OC Graceful Smiles" could refer to a specific term, name, or concept that is not widely recognized or known as of my last knowledge update. Without more context, it's challenging for me to provide specific information about what OC Graceful Smiles might refer to. If it's related to something that has emerged after my last update, I won't have information about it.

If you could provide more context or details about what you're referring to, I'd be happy to try to help you further. Is "OC Graceful Smiles" a name, a brand, an organization, or something else? Any additional information you can provide will assist me in giving you a more accurate response.