[Sanbaizu] On the way home, I went to the women's restroom with my older sister.

Shotacon (ショタコン) refers to content featuring young or young-appearing male characters. The term originates from 'Shotaro complex' (after the character Shotaro from Tetsujin 28-go). In doujinshi, this tag indicates the presence of youthful male characters in suggestive or explicit scenarios. Content ranges from innocent to explicit and is a significant demographic category. The tag is the male counterpart to 'lolicon' and often appears in yaoi (male-male) content or in heterosexual scenarios with older female partners.

Incest (近親相姦) refers to sexual content between family members. In doujinshi, this commonly involves siblings, parent-child relationships, or other familial pairings. The tag covers both blood-related and step-family scenarios. It's one of the most common narrative frameworks in doujinshi, often used to create dramatic tension or taboo appeal. Related tags include 'sister,' 'brother,' 'mother,' and 'father.'

Big ass (巨尻) is a body-type tag indicating female characters with notably large, exaggerated buttocks. This tag covers various body types where the posterior is emphasized. Artists often use this tag to highlight specific art styles that emphasize curves and body proportions. Related tags include 'big breasts,' 'dark skin,' and 'paizuri.'