Presumably, the baby-faced, underage sometimes at age or overage seductive female characters from anime and manga were represented as fascinating examples of Otaku fantasy universe.
However, I think they have no choice now but to analyze Otaku sentiment by asking themselves this: how far can their simple explanations stretch in the face of non-Japanese critics who do not share the same sentiment about Otaku justification for the sexualized manga and anime content? The character hen is catch-all for queerness as a peculiarity—it does not carry an explicit sexual reference.
Adult themes in manga have existed since the 1940s, but some of these depictions were more realistic than the cartoon-cute characters popularized by Tezuka.
The publication of erotic materials in the United States can be traced back to at least 1990, when printed its first Anime Shower Special.