most of the hentai (anime)-films in the late 1990s to the present day are based on ero-games, where the only actual goal is to date the girls in the game and have sex with one of them. the games feature various character-types, like a bookworm, a tough girl, a younger girl, and a tomboy. ero-games can include highly taboo themes, such as coprophilia or dismemberment, pedophilia, and rape. sometimes slightly less taboo subjects, such as incest. some examples of these kind of game-to-hentai-anime conversions are immoral sisters, isaku, pia carrot, five card, bible black, words worth, night shift nurses, huniepop, and milk junkies.