Tsugaru satsujin jiken

In a hotel in Tokyo, a bookstore owner was killed. A portrait of Dazai Osamu disappeared from the murder spot. What did the memorandum "Cosmos, misery ..." mean? The victim was the host of a club called "Travelling Club to Tsugaru", so Asami Mitsuhiko went to the participants of the club for their itinerary. Kanida-Kanagi-Gosyogawara, there he found several unbelieveable pieces of evidence ...