The MC transmigrated into a novel and became an extra from the novel. The novel is a murder thriller and the main character is a serial killer. He kills criminals with black magic making him a dark hero (think of him as Dexter or batman with dark magic).She (MC) doesn't have any death flags since she's a background extra but she was a homeless girl of all things in such a dangerous novel.Somehow our MC saves the male lead and to thank her, he adopts her.“Become my daughter.”The richest, most powerful, and handsome duke commands her to be his child.The MC is freaked out since she knows he's a cold blooded killer. Can she survive such a maniac?Yet he dotes on her and constantly says ‘my daughter is the cutest'! He wants to get master artists to draw her and gather poets to describe her adorableness.The duke alo has a son. The apple doesn't fall far from the tree; he also dotes on her.In this way, a beggar became a little princess. She also got used to people getting killed.However there was still one problem.Our MC has turned sixteen and is wondering as a lady, will she have an arranged marriage?The whole house atmosphere quickly turns awkward.She realizes, perhaps they want her to stay here forever?Can she escape such a strange house? Everyone is so attached to her!

"You shouldn't have crossed this line, Elisha, if you didn't want it to be like this." A sturdy arm wrapped around her swaying body. Her head became hazy and an intentional hot sweet sigh was pulled out of her. How the hell did I get myself in this situation' Elisha recalled. This never happened before. Yeah, I remember.' Her future in which she would become the fake concubine to a demonic man from the same family, and would be eaten to deatheven down to her bone marrow. A future in which the Cartier ducal family is embroiled in a power struggle and fragmented. To avoid that future, Elisha threw herself at Lucerne, the archrival of her former life. Yeah. There was no problem. She knew this man, before and after her regression. She already knew he was the most notorious maniac in the Empire. 20-year-old Elisha owes 30,000 gold coins (about 15 billion won in Korean currency or around 15 million in USD). After going back in time, in order to avoid a hellish life because of debt, she becomes the most capable illegitimate child in the world and visits Lucerne, the archenemy of her master. "What do you want from me?" "Please lend me some money. And make me your subordinate. I'll give you all the information I have." "Why should I trust you?" "I'll give myself up as collateral." Lucerne listened to Elisha and watched her quietly. "Okay. But I decide how to deal with the collateral." "." "First of all, marry me." " huh?" Elisha didn't expect it either. That her information transaction would become a marriage contract. / The Predator's Contract Partner / The Predator's Fiance