is a Japanese manga series written and illustrated by Makoto Hoshino. It was serialized in Shogakukan's Weekly Shōnen Sunday from August 2019 to April 2021, with its chapters collected in eight tankōbon volumes. The series is licensed for English release in North America by Seven Seas Entertainment. An anime television series adaptation by Ashi Productions premiered in January 2023. Plot Wisteria is an orphan girl living in a corner of the British Empire at the end of the 19th century. Her life is desolate and bleak–until she encounters Marbas, a powerful but equally lonely immortal being with a furry appearance, hounded by hunters. Together, Wisteria and Marbas roam the Empire–populated by humans and human-like beasts–in search of a place where they can live together in peace. Characters A girl who was treated like a slave. She was born with the ability to see demons. She makes a contract with the great demon Marbas, offering her "sight" to him, and goes about her daily life with Marbas as a free woman. A great demon who used to be feared, but now that the number of people who can see demons has decreased, he spends his days bored. He makes a contract with Wisteria, a girl who can see demons, and goes about his daily life with her. The older brother of Wisteria who was separated from her. His love for his sister is very deep. He wears the clothes of a clergyman and belongs to the Knights of the Sword Cross. However, he is somewhat of a delinquent. A captain of the Knights of the Sword Cross and Snow's colleague. He wields a Japanese sword. The only daughter of the Earl Blackbell family. A young lady of noble birth. She has made a contract with the great demon Naberius. She also has a friendly demeanor. A great demon. One of the Thirteen Plagues of the Collapsed Kingdom. He has made a contract with Diana, a young lady of noble birth. The leader of the Knights of the Sword Cross, a demon-slaying organization based in Europe, mainly in England. He always wears armor. His real name is . A great demon who was counted among the Thirteen Plagues of the Broken Kingdom. She was defeated by the Commander and made a contract with the Knights of the Sword Cross after being tortured. One of the Thirteen Plagues. He has a contract with