Raven Of The Inner Palace Vol. 1 by Masaaki Shirakawa

A quiet, shrewd young woman known as the Raven serves as the imperial consort tasked with solving supernatural afflictions and palace mysteries; recently freed from a life of hardship, she uses her keen insight and dark reputation to navigate court politics, investigate strange illnesses and omens, and form a complicated bond with the aloof emperor as together they uncover hidden threats within the inner palace.