ryona

Had to look this one up, at https://en.wikipedia.org/wiki/Ryona

Seems it involves abuse. (Yup, wikipedia. Deal with it.)

From wikepedia:

The term is contrasted with sexual sadism and rape pornography, in that ryona is a voyeuristic fantasy fetish, a romanticized subgenre aimed at a female target demographic and are almost always of non-explicit sexual nature.

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

Domestic violence and rape, and depictions thereof

Inconvenient disruption of everyday life, such as being prevented attending one's school or job, or being embarrassed or rejected by friends and family

Forced confinement and detention for extended periods of time

Literal torture for extortion or confession, or simply for sexual sadism and/or masochism

Being regarded and treated as property of another person

Unrecoverable traumas such as limb amputation or other long-term medical complications after being exposed to violence

So that's that. Violence, rape, torture, amputation...surprised to see it being offered here alongside "Playboy" as an innocuous alternative to hardcore.