How do you unlock Neko Chan?

I'm curious, how exactly does one unlock Neko Chan? Is there a specific set of steps or requirements that need to be met? I've heard it's related to a particular game or platform, but I'm not sure of the exact details. Is it something that requires a lot of time and effort, or is it more straightforward? I'd love to know more about the process and what kind of rewards or benefits come with unlocking Neko Chan.