A Sign of Affection

is a Japanese manga series written and illustrated by suu Morishita. It started serialization in Kodansha's Dessert magazine in July 2019. As of July 2023, nine tankōbon volumes have been released. An anime television series adaptation produced by Ajia-do Animation Works is set to premiere in January 2024. Characters Development In an interview with Kodansha USA, the author duo suu Morishita stated that they decided to make the main theme sign language since they were both interested in the idea. However, since neither of them had much experience with sign language, they did research, which included reading books on the subject, interviewing teachers, and getting someone to supervise how it was used. When it came to the art, they decided to use Copic Multiliner brown markers for the outlines and Dr. Ph. Martin's color ink for the coloring because they felt it gave the art a "soft and delicate" style.