Lessons on Raising a Partner - Chapter 123 - Great Sword!

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

Enigmatic hands, spectral frame, and one cunning strike just like the swing of the Grim Reaper. The Supreme Assassin takes on the mystical world, and how his legendary tales sets off, progressively ascending the altar to becoming the best.

- Description from Novelupdates

In her previous life, she had given everything for him and helped him step by step to become a great minister, but she was not as good as her good sister who slept with him.

When the gentle and loving husband took her life, she realized that the love she thought was as deep as the sea was a joke.

To the end with hatred, Lu Xiang cursed angrily, wanting to let the person who wronged her and harmed her have a terrible death…

Opening her eyes again, she returned to the year she was fourteen years old. She had the same life, but she returned with hatred in her heart.

…

The night was dark and the wind was high, Lu Xiang picked up Chu Jinyan who was hunted down and seriously injured, his eyes sparkled.

“Hey, golden thighs!”

So without further ado, he dragged the person into his room to hide.

“As the saying goes, life-saving grace should be promised with your body… Ah, no, I will repay you with the spring, I saved your life today, and you have to promise me three requests in the future.”

Chu Jinyan: “???”

He doesn’t really want to be rescued…

Later, Chu Jinyan patted his thigh and hooked his fingers: “My concubine, come, I’ll give you my lonely thigh.”

***

She: insidious, deceitful!

Him: despicable, shameless!

Passerby A: So they are a match made in heaven?

Passer-by: Bah, that’s called working in collusion!

- Description from novelbuddy

With the Goddess’ blessing, he became a 『Divine Knight』 and founded an Empire.
As time passed, he grows older, and by the time the heavens called for him to come, the Goddess showed before him, asking for his last wish.

He wished to be reincarnated in the future.
He dedicated all his life for his people, he had no time to master his own arts.
This time, he wishes to live for himself, forging his body to the utmost limit.

The Goddess complied with his wish.
In the far future, the King shall reincarnate as the 『daughter』 of a renowned Knight family.
And, under some circumstances, she is labeled as a failure of a Knight, however——

「How convenient. I can stand on the foremost line without needing any rank. No better training than actual combat!」

Thus, the legend of the world’s strongest, most beautiful Knight Disciple (♀) has begun—