Siesta

Siesta is an enigmatic silver-haired girl who proudly claims the title of 'Great Detective' and serves as a key operative within the Twelve Tuners, a clandestine organization dedicated to preserving global order. Four years prior, amid a harrowing mid-air hijacking crisis at an altitude of ten thousand meters, she handpicked an ordinary young man named Kimizuka Kimihiko to be her assistant. Together, they spent three relentless years combating the shadowy syndicate known as SPES. Though she had already passed away by the time the story begins, the meticulous plans she left behind—and the heart that continues to beat in her absence—quietly shape the fate of the world.