Tantei Ha Mo, Shindeiru. 3 (MF Bunko J) [Light Novel]

[Machine Translation] I, Kimihiko Kimizuka, once an assistant to a famous detective, was kidnapped one day along with Natsunagi, Saikawa, and Char. Then we learn the truth about Siesta's death. We were stunned when a mysterious girl who looked exactly like Siesta before her death appeared in front of us and told us that there was a mistake in the current past footage... The girl's face is a little bit darker than the one on the left. It was a mistake made by the flawless Siesta, a detective who could not find the faintest of feelings. While searching for this mistake, we learn the true meaning of taking over as "great detective". The detective is already dead. The truth of his death has been revealed. But it is still too early for the epilogue.

かつて名探偵の助手だった俺・君塚君彦は、ある日、夏凪、斎川、シャルと共に誘拐された。そして知らされるシエスタの死の真相。呆然とする俺たちの前に、生前のシエスタそっくりの謎の少女が現れ、今の過去映像にはある間違いがあると語り出し...「どうやらやっぱり私は、人の感情を読むのは苦手だったらしい」それは完全無欠のシエスタが犯したミス。名探偵であるが故に見つけられなかった微かな想い。その過ちを探しながら、俺たちは“名探偵”を継ぐことの真の意味を知っていく。探偵はもう、死んでいる。死の真相も明かされた。それでもエピローグにはまだ早い。