DETECTIVE IS ALREADY DEAD (2021) DIGEST-SIZED TRADE PAPERBACK #3

Due to my penchant for getting dragged into things, I, Kimihiko Kimizuka, an ordinary high-school student, suddenly was asked to protect national idol Yui Saikawas Three-billion-yen sapphire!? When theres a detective, theres always a case, and so, another case begins for me and Siestas hearts recipient, Nagisa Natsunagi!