[Chiku] Yamada Fusai, Yoru no Usagi-san-gokko

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.'

Femdom (Female Dominance) is a dynamic tag where female characters take the dominant role in sexual or romantic scenarios. This ranges from mild assertiveness to full BDSM domination. The tag covers a wide spectrum of dominance levels and scenarios. Related tags include 'bondage,' 'collar,' 'pegging,' and 'males only.'

Big penis (巨根, kyokon) is a body-type tag indicating male characters with notably large genitalia. In doujinshi, this is often exaggerated for visual effect. The tag appears across all genres and is commonly paired with tags like 'sole female,' 'nakadashi,' and 'x-ray.'