The Love Lasts Forever, Just Like When We First Met

The male protagonist and the female protagonist are childhood sweethearts. They grew up together. Because the male protagonist is an only child, his parents were busy with their careers and neglected the male protagonist. The male protagonist's childhood was not happy until the female protagonist's family moved. The female protagonist's home was warm and loving, and she always played with the male protagonist. She often brought the male protagonist home. The male protagonist grew up in the female protagonist's family when he was a child. The female protagonist's parents also liked the male protagonist. They always regarded the male protagonist as a son in the family, and even wanted to treat the male protagonist as a son-in-law. The female protagonist's eldest brother took care of the male protagonist as a younger brother since he was a child. The male protagonist also respected his eldest brother, but the second brother of the female protagonist thought that the male protagonist was an outsider who came to rob the female protagonist. He was hostile to the male protagonist when he was a child, and he did not deal with the male protagonist when he grew up.