I'm the Only Female Sentinel. Is Being a Little Overpowered Really So Unreasonable?

[Interstellar sentinels and guides + female sentinel, male guide + unconventional path to healing + dark, volatile obsessive who falls for her on his own + forced love] Ji Ling transmigrates as Shen Jiyuan’s fiancée. He is the greatest villain in the galaxy. The good news: the villain hasn’t turned evil yet, so there’s still time to change things. The bad news: she’s tormented and abused him for over a decade, then sold him to an underground research facility. The villain hates her, his fiancée, with every fiber of his being. To avoid being tortured to death in the future, Ji Ling acts decisively, rescues the villain, and flees with him to a barren planet. She goes into debt to buy an awakening potion, only to become the galaxy’s one and only female sentinel. Luckily, the villain happens to be a male guide. She didn’t do it on purpose. Who would believe that? They mine together on the barren planet and support each other. Ji Ling, a useless sentinel, grows stronger by the day. Just when she thinks she no longer needs to fear the villain of the future, she discovers his secret. Ji Ling: We’re just roommates. I’ll obediently break off our engagement, so please, just let me go. The villain: Let you go? Impossible! You’ll belong to me forever. Don’t even think of abandoning me. I’ll cling to you until the day we die. He’s insane. Ji Ling just wants to run.