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The word ryona (リョナ, ryona, a portmanteau of ryōki ("seeking the bizarre") and onanī ("masturbation")) is a type of sexual fetish in hentai wherein a protagonist is subject to sexual, physical or psychological abuse from an offender. The term is mostly used in connection to Japanese culture, although the themes of misogyny, misandry, sadomasochism, schadenfreude, compassion, exoticism and extremes erotica is seen in many other cultures.

The term ryona almost exclusively refers to the action of a woman being abused by a man. In a case where the target is male, it is more commonly called gyaku-ryona (逆リョナ, gyaku-ryona, "reverse ryona"), and generally implies content with a female assailant and a male victim. The genre focuses exclusively on fictional characters in these situations. In some cases, the perpetrator could be a monster or other non-human being.

Because the fetish is very broad in scope, it often contrasted with or incorporates other, more common, fetishes such as humiliation, sexual sadism and rape pornography, in that ryona is a complex and nuanced voyeuristic fantasy fetish, a romanticized subgenre aimed at a female target demographic and are almost always of non-explicit sexual nature. Unlike guro (グロ) genre, Ryona is never progresses to the point of lasting physical harm, bleeding or death.


Works in the ryona genre usually depict two characters meeting and developing a relationship with each other, which may begin in or devolve into a state of hostility.


The nature of abuse can vary greatly, but it usually includes one or more of the following: