(C93) [Earthean (Syoukaki)] In my room. (Fate/Grand Order)

Sole female indicates that a gallery features exactly one female character throughout the entire work. This tag is important for readers who prefer focused, intimate scenarios rather than group dynamics or harems. It doesn't imply anything about the number of male partners — a sole female gallery can feature one male partner (sole male) or multiple. The tag helps distinguish between different relationship dynamics and is commonly paired with tags like 'sole male' for one-on-one scenarios or 'multiple male' for gangbang-type content. In terms of narrative structure, sole female works often develop a single relationship or encounter in depth rather than juggling multiple characters.

Paizuri (パイズリ) refers to breast-based sexual acts where the penis is placed between breasts. Also known as titjob or mammary intercourse. This tag is closely related to 'big breasts' as the act typically requires larger breasts to be depicted. Artists use various techniques to show the visual appeal of the act, including compression, jiggle, and facial expressions. The tag frequently co-occurs with 'big breasts,' 'sole female,' and 'blowjob.'

Futanari (ふたなり) refers to characters with both male and female sexual characteristics — typically female-presenting characters with a penis. This is a significant genre in hentai with its own dedicated audience. The tag covers a wide range from characters with both sets of genitalia to characters who are essentially female with male genitalia. Artistic treatment varies from realistic to highly stylized. Related tags include 'males only' (for futanari-only content) and 'yuri.'