The Detective Is Already Dead/Tantei Wa Mou Shindeiru/La detective está muerta/探偵はもう、死んでいる。
This is a server is about the Japanese light novel series Tantei wa Mou, Shindeiru (The Detective Is Already Dead) written by Nigozyu and illustrated by Umibouzu.
Siesta and Kimizuka both of them are the protagonist of the series.