MTL - On the Day the Scumbag Got Married, I Lay Flat and Became His Sister-in-law - Chapter 20 raise her as a concubine

At her cousin's birthday party, she was schemed to have a relationship with her cousin's fiancé, becoming the most shameless woman among rich families, and therefore married to that man, the most influential big shot in the city.After marriage, the wholehearted love only brings endless humiliation and disgust.Later, her cousin returned. He threw out the divorce agreement, saying, “Give Mrs. Leng's position back to her.” He even took their child and gave it to her cousion who was unable to bear children.She finally became disheartened and fled far away with their child, completely disappearing from his world.On his wedding day, he suddenly learned the truth and realized that his white moonlight had always been her, not her cousin.“If love is an isolated island, I'm willing to settle there for you forever.”

Kiyoshiro Takeda lived a life without purpose, drifting through his days with no direction. But one fateful moment changes everything. Now, he finds himself in a world unlike any he has ever known, given a role he never asked for. A new life, an unknown destiny, and a looming catastrophe that only he can prevent. But can someone who failed in his old life truly become the last hope?

Before going to college, an ordinary high school student went to celebrate and got drunk. When he woke up, he found himself in a completely different world. There was a big sect, the approaching sect entrance examination, a slum where his body’s previous owner lived, and a shared memory about a missing young girl.

When he got tangled in a fight with a few punks in this different world, he fell off a cliff and miraculously found himself still alive, with two more voices ringing inside his head. They were Sword Master and Saber Master. In the company of them, he continued to find out more about this whole new world. He took the sect entrance examination, entered the sect, met a strange man in black, and even participated in a major competition of the sect to have a chance to win over his peers!
In this whole new world, he was born again and got to explore the fantastic martial world!

- Description from Novelupdates

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—