[Fuji-han, Runa Usagi] Furou Fushi Shoujo no Naedoko Ryokouki - The Nursery Travel Report by a Immortality Girl. 1

Big breasts (巨乳, kyonyu) is one of the most iconic body-type tags in doujinshi and manga. It refers to female characters with notably large, exaggerated breasts that often serve as a central visual element. Artists typically emphasize size, weight, jiggle physics, cleavage, and breast-focused activities like paizuri (titjobs) and breast play. This tag spans nearly every genre — from vanilla romance to hardcore fetish content. The artistic treatment varies widely: some artists favor realistic proportions while others push into exaggerated territory. Related body-type tags include 'huge breasts' for extreme cases, 'small breasts' for the opposite aesthetic, and 'paizuri' for breast-focused sexual acts. The tag often appears alongside 'sole female' and 'nakadashi' in heterosexual content.

Impregnation (孕ませ) is a fetish tag focused on the act of getting a character pregnant. This often involves detailed internal views (x-ray) showing ejaculation and fertilization. The tag is closely related to 'nakadashi' and 'pregnancy' but specifically focuses on the conception moment rather than the resulting pregnancy. It's a significant fetish category with its own dedicated audience.

Tentacles (触手, shokushu) is a genre tag covering tentacle monsters and their interactions with characters. This is a distinctive genre in hentai with roots in Japanese horror and fantasy art. The tentacles can range from realistic sea creatures to fantasy monsters. The genre often features non-consensual scenarios and is closely related to 'monster' and 'rape' tags.