Ayakashi Koukyuu no Keiyakuhi

Yurei has the ability to see "ayakashi," or evil spirits. She gets a job as a servant girl in the palace to help buy medicine for her father, but she finds that the imperial harem is full of dangerous and intrigue! Yurei's power, and her relationship with the "ayakashi," will not only affect the harem, but shake the entire fate of the country itself…!? An exciting Chinese-style palace fantasy about a former acrobat who signs a contract to become a temporary concubine for the handsome but ruthless crown prince!!

(Source: Comic Bridge, translated)