Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Chapter 552 - 18-10. Tales of Hero Hayato [7]

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

Every drop of this family bloodline is stained with sin. They are the embodiment of contradiction; calm yet maniacal, with great memories yet often forgetful. They pledge themselves to their dreams yet often compromise, are angels that are also devils… It’s why I hate them. And also love them.

Calling the old god’s mage, the knight who inherits the bloodline, looking forward to the glory of yesterday;

The noise of steam engines and the roar of cannons indicate the direction of the future;

An Sen, who was living in this world, embarked on a road that had never been imagined;

In the ashes of the old world…he shall be crowned king!

- Description from novelbuddy

At 20 years old, Su He married Mr. Jiang, a business tycoon with billions to his name, proudly hailed as a business mogul. Upon learning of this, people said that she, a country bumpkin lacking background and wealth, was merely a poor doctor with a beautiful appearance, unworthy of the esteemed Jiang family head. Gradually, however, people discovered that this 'poor doctor' with 'no background' was in fact the jewel of a prestigious medical family in the capital, an expert surgeon in the medical field, an heir to a medical research institute, and a mysterious designer... Everyone knew that within Mr. Jiang's heart, there was a cherished figure. As the four-year marriage agreement neared its end, the man handed her a document, his tone gentle yet assertive: 'Sign it!' 'A divorce agreement?' Su He asked, her eyes bright with unconcealed excitement and anticipation, having longed for a divorce. The man snorted coldly, 'Just sign it!' Not long after, Mr. Jiang reneged, stating: 'Since you've given birth to my child, you'll be mine for life!'