[Yamamoto Naoki] Sekai saigo no hibi | Last Days of the World - Best Short Stories [Digital]

Anal intercourse is a common sexual act tag in doujinshi. It appears across nearly all genres and demographics, from vanilla romance to extreme fetish content. The artistic depiction ranges from realistic anatomy to highly stylized presentations. This tag frequently co-occurs with tags like 'nakadashi' (internal ejaculation), 'big breasts,' and various body-type tags. Some artists specialize in anal content, developing signature techniques for depicting the act. The tag covers both consensual and non-consensual scenarios depending on accompanying tags.

Glasses (メガネ, megane) is a costume/accessory tag with a dedicated following in doujinshi. Characters wearing glasses — whether thin-framed, thick-rimmed, or sports glasses — appeal to a specific aesthetic preference. The tag covers all types of eyewear and is often associated with character archetypes like the 'meganekko' (glasses girl). Artists use glasses to add visual interest and character personality. The tag appears across all genres and frequently co-occurs with 'sole female,' 'big breasts,' and 'stockings.'

Anal intercourse is a more specific variant of the 'anal' tag, specifically indicating penetrative anal sex rather than anal play or other anal-related activities. The tag helps distinguish between different types of anal content.