In an alternate version of the Edo period—one where the Meiji Restoration never happened, the samurai were never outlawed, and Japan never opened its borders to the outside world—a woman named Asumi has been trained since childhood as a warrior of the Black Clan. Her orders are simple and she has always followed them. Now she has been appointed Justicar of Edo and sent into an academy in an unfamiliar role: undercover, in plain sight, tasked with identifying a rebel whose activities could ignite a civil war. Sword of Asumi is a visual novel with multiple endings depending on how Asumi navigates her assignment.