Him and her. Chen Yanyan and Lin Xia. He is older than her, but he is her younger brother. She is her junior sister, but she always acts like a child. He is calm and knowledgeable, but she is well-behaved and smart. He only met her after he went to college, but she had already met him. He was always worried that she would reject him if he really told her that he liked her, so he always said that he would take care of her like a younger sister. But she always said that she liked the senior. As a result, they become entangled with each other and remain ambiguous.