Sendai Yuusha wa Inkyou Shitai - Chapter 98 – The Preceding Hero and the Female Pirate

Marianne, a talented curator at a museum, caught the attention of Mrs. Chaterine Ganke, a painting enthusiast who was also a very wealthy lady. The lady liked Marianne so much that she insisted her grandson, Leonardo Ganke, to marry her. Leon didn't love Marianne, but he couldn't refuse his grandmother's request.

On the night of her wedding, Marianne was insulted by her husband.

“Have you looked at yourself in the mirror? Ugly girl, don't expect you to sleep in the same bed with me!!!” Leon shouted to Marianne in contempt.

I, Daddy, Paladin,

The first under the stars to bring a baby to PK strong!

If you don’t accept it, come to fight!

- Description from novelbuddy

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!

You shall become king—

Ruling over all “serpents” in the world…

Become the man who bears the brunt of dragonkind’s fear and hatred.

A modern era when humanity is threatened by attacks from giant dragons flying from beyond the sky.

Controlling “leviathans”—serpentine spiritual beings created through magic—humanity is locked in a protracted war of resistance against the dragons.

Fortunately, there exist witches known as “magi”—battle maidens of salvation who formed covenants with “serpents” in order to combat dragons.

Nicknamed Hal, the young man called Haruga Haruomi makes his living through facilitating the covenants of these girls.

At the (partially coercive) request of his childhood friend Asya, one of Europe’s top witches, Hal returns to Tokyo New Town after an absence of three years.

Accompanied by the beautiful Asya whose appearance rivaled a fairy’s, Hal is running all over the place to secure his base of operations and taking care of matters related to school transfer when the elite dragon Soth suddenly attacks—!?

Life has been breathed into a brand new myth between dragons and dragonslayers.

A grand opening to the “birth” of a top-class battle epic!