Call a Deer an Immortal

She should have checked the demon calendar before leaving home. No wonder everything went wrong. All she wanted was to sell a stone and get some eggs, so how did she end up attracting his attention? What rotten luck to run into this overbearing human prince. Good thing she had a brother as beautiful as an immortal descending to earth to save her. Wait, this brother is also a disciple of her own father? Perfect! Maybe she can get close to him and win his heart. The overbearing prince gave a cold snort. “Don't even think about it. You owe me a debt stretching back ten thousand years. In this life, the next, and the one after that, you'll belong to me alone.” Her immortal brother replied softly, “You're not the only one bound to her by ten thousand years of fate.”