Why bother with the saga after being reborn?

Jiang Yan was reborn. In his previous life, he was tricked by his imprisoned father into believing that as the eldest grandson of the Jiang family, he was obligated to take care of his grandparents, respect his uncles, and be kind to his brothers...
To hell with the heavy responsibilities of being the eldest son and grandson. Having been given a second chance at life, all he wants is to get rid of these bloodsuckers in the Jiang family, find a powerful figure, live off his wife, and soothe his ailing stomach.
*****
Song Jiawen felt something was off. The boy next door, who had to go back to his hometown to study because his father was in jail, had suddenly switched from arts to science and entered their class, even moving to the seat behind hers. He claimed he wanted her to tutor him in physics, chemistry, and biology, but why did she always feel like he had some ulterior motive?
*****
Years later, Jiang Yan looked at the soup in the pot while holding and soothing his son. He glanced back at his wife, who was leisurely watching TV with her legs crossed on the sofa, and thought bitterly, "It's a bit difficult for me to live off her!"

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