Cheng Jin transferred to Xu Yi's school. She got along well with everyone except Xu Yi. What happened later made Cheng Jin realize that her dislike for Xu Yi had already changed. Xu Yi had already understood that his feelings for Cheng Jin were different from others. He would think of her when he was down and he would think of her when he was happy. Her back was by his side all the time. He even hoped that she would stay by his side for the rest of his life.
Concept: He said she was like a kitten, very polite to outsiders, but unscrupulous to him