Movie universe. After Kenshin defeating Shisio and before the final scene with Kaoru. Spoilers for Legend Ends.

AU. In the eleventh year of the Meiji, 1878, Japan still practices chattel slavery. The Tokugawa shogunate still reigns from Edo castle, backed by the infamous Kanryu family and their merchant empire. And Kaoru Kamiya finds an abandoned slave hiding under the docks as she's walking home...