Responses
Commenting because I'm interested :')
Is it this one? :)
http://www.mangago.zone/read-manga/sengoku_blood/
Yes this it, thank you
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I'm looking for a manga where a twin girl makes a contract with a devil to be her twin brother. They are both royalty but she was cast out because twins are a bad omen. Her twin brother absolutely loves her but dies. He is the leader so in order to protect her home. A priest gave her a box that allows her to make a contract with a devil