Tanjiro Kamado joined the Demon Slayer Corps to turn his sister Nezuko back into a human, and this row collects the short manga the official fanbooks printed around that story. One piece recasts the Corps as the staff and students of Kimetsu Academy; another interviews demons on the far side of the Sanzu; a chapter zero goes back to Kyojuro Rengoku's first assignment; and a later instalment checks in on Tanjiro. Koyoharu Gotouge's early drafts of Kisatsu no Nagare sit beside them. It is companion reading, not a place to start.