In Xia Baibai's understanding, he was born because he was his sister's replacement, and he was abandoned by his parents because of her.
No one believed that she didn't hate her sister, let alone her parents. She just wanted to return to a world without them.
Xia Baibai once said this to another person in her heart without anyone noticing: If I am not the most important person in your eyes, then I'm sorry, no matter how good you are, I won't want you anymore.
Intention: If I am not the most important person in your eyes, then I'm sorry, no matter how nice you are, I don't want you.