In Different World with Naruto System (WN) - Chapter 326: Returning to Demon World

Ling Mohan is an extremely aggressive and domineering Colonel of the No.1 Military Industry Group.

One day, a woman who comes out of nowhere hits him in the head! It turns out that the two are acquainted and had a fling three years ago, after which Ling disappeared, leaving a note asking her to wait for him.

She, however, married another guy, who “died” as mysteriously as Ling Mohan disappeared.

Now fate has arranged a meeting for them on a narrow path. He is determined to avenge her with the craziest passion, and she is determined to torture him with the most seductive flirtation. When beast and beauty meet a second time, who will excel and triumph?

- Description from Novelupdates

Shao He, heir to a family renowned for medical and poison skills, a top special agent of the 21st century, unexpectedly transmigrated into the body of a pathetic Madam Marquis who had been tortured to death! And on that very night, she was thrown into the Mass Burial Mound!Looking at the newborn in her arms, Shao He resolved to live a splendid life in this foreign world!From then on!She was the Divine Doctor who aided the world!She was the fearsome Poison Queen!She possessed wealth to rival nations!She was also an astonishing scholar!And the Marquis, filled with regret, wished he could kill himself on the spot, “He'er, I was wrong, you...”“Shut up, I am now the Empress!”

A single beam of light could annihilate the world, a single blade of grass could sever the stars.Shen Qing transmigrated to a magnificent universe where immortals and mortals coexisted, becoming a lowly hunter.With the help of the Water Ink Panel, Shen Qing could endure the refinement of Qi-Blood and cultivate a hundred techniques.A technique, after a thousand hammerings, could border on art, and an art, after a hundred refinings, could border on Dao.From the common Bow Technique of rural hunting, to the Sky-Patrolling Sun Shooting Bow Technique;From the Nine Skills, which nourished and trained Qi and Blood, to the undying Six Paths of Reincarnation Technique;From the outward release of strength in Wind Defying Finger, to the Qi that suppressed mountains and rivers with the Eight Desolate Annihilation Seal;From enduring the refinement of Qi-Blood, he embarked on a difficult path of seeking Dao; to commanding the skies, with the divine might as if overseeing a prison, having mastered the balance of the six realms.It was only when Shen Qing looked back that he realized he had unwittingly become the supreme ruler above ten thousand Daos, an unparalleled True Monarch!

With a marriage contract forcefully done, he married her, and all she could do was comply, and resent him deeply for that and for all the following misunderstandings they faced.
However, it was already too late when she understood she actually loved him.