Theme glossary

The following is a list of approved themes.

Terms that lack definitions are regarded as self-explanatory.

Setting themes

 * Combat Sports
 * Confinement
 * Consensual
 * Contemporary Fantasy - Modern day Earth, but with fantastic elements.
 * Contemporary Sci-Fi - Modern day Earth, but with science fiction elements.
 * Futuristic Sci-Fi - Takes place in the near or distant future of Earth, with the presence of science fiction elements.
 * Gekokujou - Refers to a plot where a female character whose position previously required her to follows the orders of another character (an employee to a boss, a maid to a master, a slave to an owner) instead plots to overturn the status quo and dominate that other character. This is a Japanese term that can be translated as "the lower rules the higher", and which is in use as a content tag on the Japanese erotic doujin store DLsite.
 * Hero and Demon Lord
 * Historical Japan - Pre-industrialized Japan, depicted in a way that isn't necessarily historically accurate. May include the presence of fantasy elements like youkai (monsters) or supernatural ninjutsu.
 * Lifestyle BDSM
 * Modern Day - Modern day Earth.
 * Modernized Fantasy World - A world that isn't Earth, with fantasy elements like magic or monsters, in which society's state resembles the 20th or 21st century with the presence of apparent industrialization and inventions like cars, telephones, or computers.
 * Medieval Fantasy World - A world that isn't Earth, with fantasy elements like magic or monsters, in which states are typically feudal monarchies, the industrial revolution apparently hasn't happened, and inventions like cars, telephones, and computers don't exist or are extremely rare. Society resembles a fictionalized version of the Middle Ages or the European Age.
 * No Male Penetration - No male characters sexually penetrate the anus, vagina. or mouth of any female characters. This theme should not be applied to works with mostly lezdom.
 * Only A Single Male Penetration - There is only a single sex scene in which a male character sexually penetrates the anus, vagina, or mouth of a female character.
 * Slavery - The plot heavily features people who engage in the slave trade, which may or may not actually be legal within the fictional setting. Should not be confused with lifestyle BDSM.

Gameplay themes

 * Battle Fuck - Sex-based battles. To elaborate, the player and enemy female characters engage in a battle system which doesn't involve physical violence, where they attempt to cause each other to orgasm by using sexual attacks that raise the other's arousal, with orgasms typically causing a reduction in sexual stamina, and reaching zero stamina being equated with loss of the battle. This is a Japanese term which is often abbreviated as "BF".
 * In-Battle Arousal Gauge - Refers to a battle system where the player has a sexual arousal gauge in addition to their HP gauge while in combat with enemy female characters, which is raised by their sexual attacks, and having a high arousal gauge makes the player more vulnerable to the enemy's attacks or induces the player's loss. Don't apply this theme to BF games, where it's already assumed that arousal can lead to loss in battle.

Protagonist themes
There is no male protagonist theme because that is considered the default assumption.
 * Dominant Female Protagonist
 * Switch Female Protagonist
 * Submissive Female Protagonist
 * Submissive Futanari Protagonist
 * Protagonist Choice

Dominant heroine themes
All of these themes refer to cases where the term in question refers to a dominant female character. They should not be used in cases where the character the theme applies to is not dominant.
 * Dominatrix
 * Futanari
 * Giantess/Mini-Sub - A large portion of the domination in the game either has the dominating character be a giantess, or the dominated character be in a shrunken state (a mini-person, AKA mini-submissive).
 * Monster Girl
 * Mother
 * Ojou-sama
 * Older Sister
 * Succubus
 * Taller Girl - A large portion of the heroines in the game are at least a head taller than the character they dominate. Should not be used to refer to situations with mini-giantesses, giantesses, or girls dominating a shrunken character.
 * Younger Sister

Other themes

 * Free