Otto wa Jitsu wa Josei deshita

Classmates Tsushima and Wafuko have been married years after graduating from high school. One day, Wafuko comes out to Tsushima as a trans woman. Fortunately for Wafuko, Tsushima is pansexual and it's not the first time someone came out to her as trans. Note: Originally self-published on Twiter, was then licensed by Kodansha for serialization.