Qing zai, bu neng xing

the long version

"Many years ago when they first met, he was as gentle as a lamb, and was in love with another girl. However, she was in love with him, one-sided. Many years later, they meet again. He is a successful man, yet cold and aloof. He has no recollection of knowing her. The only thing that has not been changed is that he is still very much in love with his former girlfriend. But they get marriaged"--Provided by vender.