Seeing the castle brought memories of Katsugeki! Touken Ranbu back. It’s the first mission for Hori-chan after all, and takes place right before the lightning struck the tenshu.
Nijō Castle is a flatland castle in Kyoto, Japan. The castle consists of two concentric rings of fortifications, the Ninomaru Palace, the ruins of the Honmaru Palace, various support buildings and several gardens. (Wikipedia)