The story revolves around 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.
--from anidb

HorribleSubs 01

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Nice, inoffensive mystery with a (so far) stock kuudere female lead who will no doubt charm some here. Simple mystery and lack of a villain call into question the show's format going forward, as I am used to detectives confronting the guilty parties in these things.