The Scroll of the Sleeve (Sode no maki)

The title Sode no maki literally means "Handscroll for the sleeve," suggesting that it can be carried around slipped inside the sleeve of a kimono. This set is regarded as a masterpiece of the erotic prints by Torii Kiyonaga. This work is unique for its strikingly long and narrow format. The lovers are cropped in a very dramatic way.
For another set from the collection of William Sturgis Bigelow now in the Museum of Fine Arts, Boston, image accessible online at https://www.mfa.org/collections/object/the-scroll-of-the-sleeve-sode-no-maki-277959