The Detective Is Already Dead, Vol. 12

After saving the world from collapsing, the two Ace Detectives and their assistant, Kimihiko Kimizuka, are immediately thrust into the next crisis: the Tuner Hunt. But when the likely culprit surfaces, it turns out to be the most unforgettable girl of all! Meanwhile, a client visits the Shirogane Detective Agency claiming to have been reunited with Kimihiko's teacher--a man who supposedly died eight years ago. What is real and what is fake? What's true and what's a lie? Within four locked rooms, Kimihiko is forced to ask himself what he wishes for and who he really is--questions no one can run from.