Shotaro Tatewaki is a normal high schooler, but he has an unusual acquaintance. Sakurako Kujo’s obsession with “beautiful bones” and her forensic skills give her a keen eye for homicide. When he’s with her, Shotaro somehow ends up studying murders.
Three of Isozaki’s students were inseparable until one vanished. As one of the remaining two disappears, Sakurako begins to assemble the bones of a more nebulous skeleton.