I'm not sure exactly what's in it, but the term suggests it might involve some kind of nude cartoons or caricatures that could potentially be inappropriate or adult-oriented.
Well, one main difference could be the download options. Manga Rock on computer may offer different download formats or speeds compared to other platforms. Also, the search functionality might vary, making it either easier or harder to find specific manga titles.
They usually feature voluptuous alien characters in explicit and often fantastical situations. The art style might be highly detailed and focused on emphasizing the physical attributes.
It could be a form of social commentary or a humorous take on certain stereotypes of older women. But the exact meaning depends on the context and the creator's intention.