With contributions by MaddieFay. - Thanks!
A form of erotica in which images, often sexual but not necessarily,
are combined with text that is added directly to the image to form a
short illustrated story. Occasionally, several images of the same
people are captioned and combined into a series of captions, but the
erotic stories within captions are generally considered best kept short
enough to fit in a single image.
These can range from short bits of text or dialog coming from the characters displayed to longer stories that require not only the empty spaces already present in the image but also that new margins be added to accommodate text. They can also range across all fetishes, so long as images either depicting the acts or adequately suggestive of the acts described in the caption can be obtained.