Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
Japanese literature illustrator Soichi is asked by high school friend and non-fiction writer Miyabi to help her with the request she received. Forty years ago, she was looking into a man found dead on the roof of a Roppongi-Tokyo building. The police at the time concluded that the man was not a crime, and the man was treated as an unidentified "unidentified decedent." Without knowing the identity or purpose of the client, Soichi and Miyabi begin investigating who the man was and why he died quietly on the roof of the building. As they go around the former building, they end up with a strange person who holds the key, but behind it lies a huge secret far beyond their imagination.