(C94) [Psychetangle (Keta)] Natsu no Muregitsune (Touhou Project)

Nakadashi (中出し) literally means 'internal ejaculation' and refers to creampie scenes in doujinshi. It's one of the most common sexual act tags, appearing in over 120k galleries. The tag covers vaginal internal ejaculation specifically. In narrative terms, nakadashi often serves as a climactic moment and may be tied to plot elements like pregnancy, impregnation, or relationship escalation. Artists frequently emphasize the visual aspect with detailed internal views (often using x-ray techniques). Related tags include 'impregnation,' 'creampie,' and 'internal cum shot.'

X-ray (X線) is a visual technique tag where the artwork shows internal anatomy during sexual acts. This allows viewers to see internal ejaculation, penetration details, and other anatomical elements that wouldn't be visible in a normal perspective. The technique is unique to illustrated content and is a significant artistic choice. It frequently appears alongside 'nakadashi' and 'impregnation.'

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.'