Tatewaki Shoutarou and Kujou Sakurako. Shoutarou is a normal high school student with a serious demeanor who likes to show off his girlfriend Sakurako. 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.