Authoring, ie portrayed characters and their surroundings do not belong to any product (anime, movie, game), and is entirely an invention of the artist. 長髪:
Length is shorter than shoulder length, but no longer than the knee. ソロ:
Images depicting only one character.
No one else should be visible in the picture. 長身像:
An image that has aspect ratio of less than 1:1 (height is bigger than width).
This tag is automatically added to images. 赤面:
Pink or scarlet cheeks. light erotic:
Images with girls wearing lewd clothes, swimsuits, having visible underwear (or lack thereof while wearing outer clothing) or (and) shown in suggestive poses.
Body parts such as genitals and female nipples are not directly depicted.