Ichiban Ushiro no Daimaou - Volume 12, Chapter 2 — Concerning Life that Should Finally End

Lao Chen was just an old, underpaid security guard in a rundown apartment complex, living a miserable life under a stingy, ungrateful boss.His wife left him, his daughter wanted nothing to do with him, and poverty was his only constant companion.In the end, death came in the form of a drunk driver, leaving him broken and forgotten on the cold pavement.But fate wasn’t done with him. In his final moments, he prayed—desperate, pleading to any deity who would listen.And someone did.The God of Wealth and Love took pity on his wasted life and granted him a second chance.Wake up again as Zhao Yiming, a 25-year-old gambler and alcoholic drowning in debt with nothing but a good face and a strong body to his name, he was given the Affinity Money Maker System—a mysterious power that let him gain wealth and influence by forming relationships, whether as lovers, friends, or even enemies.Before he knew it, he had stumbled his way into unimaginable riches.But things never go as planned. One moment of recklessness—one affair with the wrong woman—led to an unexpected murder.Now, the system has thrown him onto a new path: The Villain Route. With a negative perk that keeps the police off his trail but tightens the noose around his future, Zhao Yiming is faced with an impossible choice.Will he claw his way to the top and become the billionaire he was meant to be? Or will his second life end behind bars, just as tragic as his first?

I became a side-character who died in anguish because of her good-for-nothing husband.

If I can’t avoid getting married, why don’t I change who I marry instead?

“Excellent, marriage sounds good.”

“Wise choice. Then let’s have a wedding ceremony that isn’t too ceremonious. Following that, I’ll need you to go down to the Fief and behave like the lady of the house until I call for you. Naturally, there won’t be any time to spend in leisure whilst dousing yourself in luxuries.”

“I’m not marrying you, but your father instead.”

“……Pardon?”

“I’m not going to marry you. Do you have a problem with that?”

A good-for-nothing man married a beautiful girl but was kicked off the bed on the wedding night. Furiously, he wrote a bill of divorce and ran away.
He was schemed a car accident in which he nearly lost his life. However, it turned out to be a blessing. He swallowed the soul that passed through the outer world, thus obtained superb medical skills and martial arts.
Later on, with the silver needles and invincible martial arts, he embarked on the road of counterattacks and was committed to his great dreams.

- Description from Novelupdates

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates