My Mortal Enemy and I Became the Parents of a Delinquent

(Both transmigrate + devoted only to each other + one-on-one) Su Wan and Lu Zao both grew up in an orphanage and have been bitter rivals since childhood. They’re about to find out who comes out on top. Then an accident sends both of their souls two thousand years into the past... into the bodies of a couple with blond hair. They look down and see two little blond kids. They’re both dumbfounded. Since they couldn’t settle things in their previous lives, they’ll just have to keep competing in this one. Su Wan and Lu Zao undermine each other even as they seize opportunities and build their own careers. Su Wan makes her first fortune selling little accessories at a street stall, and Lu Zao turns around and starts a computer repair business. By the time Lu Zao has just set up his small studio, Su Wan already has a shop of her own. Su Wan builds a trendy domestic brand from scratch, while Lu Zao becomes an internet mogul. Oh, right, there are two kids, too. But as they keep competing, things start to take an unexpected turn...