Shoujo manga/anime is targetted at junior or high school girls. Shoujo stories are usually based on the romantic development between characters, but with other plot elements and sub plots. Usually the main character is a girl but often it can be a couple or sometimes a young man.

Shounen manga/anime is for junior to high school boys. Usually more focus is set on action and fighting, though there is some room for character development.

Seinen stories are different again, with a varied target audience. Seinen manga usually revolves around a hobby such as a sport team. Seinen stories are usually less violent or sexual than other forms of manga.

Yaoi or also known as Slash manga are usually devoted to the relationship between males be it friendship or sexual. The readership is mainly female, as most have romantic elements.

Hentai Anime/Manga often is synonymous with animated pornography. Some hentai has room for a plot though for the most part this is merely to get to the sex. Much hentai is based on fetishism of some description.