Song Yan had always regarded Su Qing as his love rival and always made things difficult for him. It wasn't until the two met again many years later that Song Yan discovered that her love rival had a five-year-old child, and that child looked very similar to her. In fact, this is the story of a love rival who gave birth to a baby boy for himself, and finally fell completely in love with his love rival. The subject of this article is one-to-one, he.