The originally peaceful and comfortable life of Mu Jin, a young girl in her prime, came to an end due to her parents' divorce. Her mother's sudden remarriage made her unable to accept it for a while. The "brother" brought by her stepfather turned out to be a boy she had met once in junior high school. When he first met her, he was in a panic. When he was in the most difficult and desolate situation, this girl he had never met before, she was like a ray of soft sunshine, warming his whole world. From that moment on, he fell in love with her. He couldn't bear to let her get hurt at all, but he never thought that in the end, the person who hurt her the most would be himself.