The novel series revolves around Shōtarō Tatewaki (played byJunya Enoki) and Sakurako Kujyō (played by Shizuka Itou). Shōtarō is a normal high school student with a serious demeanor. Sakurako is an extraordinarily beautiful woman in her mid-20s from a rich family who loves “beautiful bones.” The two live in the city of Asahikawa in Hokkaido, and they get involved in various incidents regarding bones.
Code name: Yu Alexius is an ambiguous entity who loves to talk about anime and Chinese animation in general. An insatiable soul from the Pearl of the Orient, a frustrated writer and a Houtarou Oreki wanna-be. He is a piece of a lunatic and everything crazy.