Rengoku ni Warau

Vol.11 Chapter 64: Onmyouji, Obsessed with the Moon
Vol.11 Chapter 63: Ephemeral, Meeting in the Midst of Flames
Vol.11 Chapter 64.5: Side Story: Hirari
Vol.11 Chapter 63: Ephemeral, Meeting in the Midst of Flames
Vol.11 Chapter 64.5: Side Story: Hirari
The story is set 300 years before Donten ni Warau, during the Tensho Period. At Lake Biwa, the largest lake in Japan, the battle with Orochi ensued.