After I Transmigrated into a Book, I Became the ’70S’ Beloved by Doing Nothing

Su Yunnian transmigrates into a period novel and becomes a pitiful girl whose father has sent her away to the countryside. No need to worry! With her pocket dimension, even a poor little thing like her can thrive. But can someone explain why her scumbag ex and his mistress from her past life came along too?! And why are they the novel's hero and heroine? Fine. The leads have such powerful protagonist halos that she can't afford to provoke them, so she'll just stay out of their way! But while she's hiding, how does she end up taking in a poor little thing? What? He comes with an uncle, too? Perfect timing. She'll take them both away at once. She's got an image to maintain. Ha! He wants to repay her for saving his nephew by offering himself to her? No! Don't! We barely know each other!