Despised by Everyone, I Was Reborn and Took My Wife Home While She Was Still Young and Naive

[Single heroine] [Both leads reborn] [There is a System, but not much] Jiang Chen is reborn, and on the very first day, he beats up the Lu family's most beloved adopted son... Jiang Chen was the Lu family's son, missing for thirteen years, before they finally found him and brought him home. But everyone in the family favored their adopted son. Compared with him, Jiang Chen, their biological son, was treated like dirt. After living a new life, Jiang Chen no longer craves their worthless affection. So on his very first day reborn, he gives the Lu family's beloved adopted son a beating... Later, after Jiang Chen uses his golden finger to finally break free of the Lu family, they all regret what they did and beg him for forgiveness one by one... In this new life, Jiang Chen works hard to keep up with the steps of a girl. But because of the butterfly effect, she seems very different from the girl in his memories. She's no aloof campus beauty, but a clingy older sister. Later, they get married and have a child. One day, their child finds an old diary somewhere. He opens the young girl's diary. Sunny today. I've been reborn...