This book is a fan of the game Touken Ranbu. It tells the history from the Ashikaga family to the Tokyo National Museum from the perspective of Mikazuki Munechika (spirit). The tangible thing will eventually disappear, and its story will be passed down in some way.
Note: Written by two people, the writing style is unstable, so don't be surprised.
Intention: Tangible things will eventually dissipate, and their stories will be passed down in some way.