After Ten Years as a Live-In Son-in-Law, I Became a Demon. Now That I'm Free, I'll First Cut Down My Faithless Wife

This is a fantasy world where everyone devotes themselves to arduous cultivation, hoping to reach the pinnacle of life.

After Ye Lan transmigrates here, he discovers that his original body has an exceptionally rare furnace constitution. Worse, he was tricked into becoming a live-in son-in-law of the Feng family for ten years.

Ten whole years! Every day, he was exploited by Feng Ping'er, the Feng family's rotten young lady. His constitution was nearly drained dry, and he lived worse than a pig or a dog.

He thought he had already reached the end of his rope, but then Ye Lan unexpectedly awakened the “Strongest Demon Lord System.” To his surprise, he doesn't need to cultivate every day. All he has to do is punish or kill evil people to gain vast amounts of Heart Demon Points and become the strongest Demon Lord!

After ten years as a live-in son-in-law, I cultivated demonic arts. Now that I've made it, the first thing I'll do is cut down my faithless wife!