Wife, I’ll Never Hit You Again. I’ll Spoil You Instead

(The rating has only just opened and will rise later) (No System + sweet romance + one heroine + play the pig to eat the tiger + transmigrate into a book) Xiao Heng unexpectedly transmigrated into a novel about rival dynasties, becoming the Marquis of Zhenshan's heir, a man with the same name who was a violent, spoiled wastrel and a disposable character who abused his wife. He married Ye Qingning, the older sister of the novel's protagonist, Ye Chen. Ye Qingning was Ye Chen's last salvation in this world. In the novel, Xiao Heng beat her to death, and Ye Chen flew into a rage, beheaded Xiao Heng, and embarked on the path to supremacy. But things were different now. Xiao Heng's fate was about to change.

Before transmigrating into the book:

Ye Qingning knelt and begged for mercy. "H-Husband, please don't hit me. I know I was wrong."

Ye Chen warned him coldly. "Xiao Heng, if you lay a hand on my sister, I'll kill you!"

After transmigrating into the book:

Ye Qingning smiled warmly. "Husband, marrying you is my good fortune."

Ye Chen clapped him on the shoulder like a brother. "Aside from my sister, you're the person I care about most in this world, brother-in-law. Anyone who dares touch you, I'll skin them alive!"

Xiao Heng: "Cherish my wife to save my life. Starting today!"

(The blurb doesn't do it justice. Read the story itself.)