The specified phrase refers to sexually explicit or suggestive depictions of a character named Android 21 from the Dragon Ball FighterZ video game, presented in a sequential art format. Such content falls under the umbrella of Rule 34, an internet adage which posits that if something exists, pornography featuring it exists. This type of material is a subset of fan-created content, often disseminated through online platforms.
The prevalence of this type of material reflects both the popularity of the character and the wider phenomenon of fan-generated erotic content inspired by existing media. The availability and consumption of such content raise questions concerning copyright, artistic freedom, and the representation of fictional characters. Furthermore, the accessibility of this material raises concerns about exposure to it by younger audiences and the ethical considerations involved in its creation and distribution.