"This child is not my daughter." Ariel was born in the Marquis family, where she was abused and abandoned. She ended up with a miserable death after a life of endless misfortune. Then she woke up, and she was nine years old again. In order to not repeat her miserable life, Ariel decides to have a contractual marriage with the son of the grand duke, Lakarter, who is famous for blood and madness. "What are all these keys for?" The housekeeper glanced at the keys and laughed. "These keys are for the treasury of the grand duke’s family." She can use all of them as she pleases because they are all hers. (Source: Kakao, translated and edited) Note: This is a promotional oneshot for the web novel of the same name.