Geu Muhyeobji Sog Sihanbu Joyeon

The protagonist is reincarnated as a minor character in a martial arts novel, the younger sister of the male lead. To save her family, she is sold to a demonic cult, where she meets Hyuk Dojin, the young master. Each day, he asks if she wants anything, to which she always replies no. Regardless, he gives her various gifts, including money for her family, jewels, ivory, and silk clothing. Though she consistently declines further offerings, he usually accepts this and leaves. One day, however, he stares at her blankly. When she inquires about his distress, he rests his head on her shoulder and accuses her of lying. He grips her wrist and pleads with her, on the verge of breaking down, to tell him how to save her.