Shoutarou Tatewaki, a high schooler living in Asahikawa City, Hokkaido, meets Sakurako Kujou, a bone-loving ojou-san who has an ability to analyze specimen. Because of meeting her, he has to accompany her to various cases.

Shōtarō Tatewaki is a normal high school student with a serious demeanor who likes to show off his girlfriend Sakurako Kujō. 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.