CartoonHardcore is a premium site. I am sure you won t regret it. The Japanese developed the art of using cartoons to carry erotic themes. They call this art hentai. The magazines in which hentais published are called mangas.
Japanese laws prohibit mangas from showing hardcore pictures - explicit drawings.
Even so, the level of erotism in an adult manga may go very high. Some stories carry erotism only in the plot, not in the pictures. Some others mix up a little bit of sci-fi, with extraterrestrial monsters atacking young girls. Most mangas would show characters in explicit situations, just censoring the hardcore parts. The reason is that, over the last years, the art of hentai has gained the rest of the world.