Tantei Jinguuji Saburo: Kind of Blue

The 9th installment of the Tantei Jinguuji Saburo (Jake Hunter) series. Jingūji is bored and tired after several months without any cases. He gladly returns to work when the Kantō mafia requests the investigation of a certain individual. https://archive.org/details/tantei-jinguuji-saburo-kind-of-blue-official-perfect-guide