Reincarnated With The Undefeated System - Chapter 305 So Annoying.

This is a story about Gong Lixin who was the young master of an ancient underground palace in the ancient times. He was raised by his master and forced to partake sexual relationships with numerous people to cultivate his Yin Body. His master who has a Yang Body was going to absorb him after he has reach a level to become stronger. MC refused and killed his master also dying at the same time. Then he transmigrated to the modern time and thinking he will enjoy peaceful life, the end of the world arrived.

Being someone with no special powers except for his martial arts, see how he use his martial arts to dominate the times and find his lovers.

- Description from Novelupdates

I was sixteen when the gods abandoned me.The Blessing Ritual was supposed to grant me power, a divine gift to carve my future. Instead, I received nothing. No abilities. No hope. Just another nameless soul left to rot in a world ruled by strength.Fine. If the gods wouldn’t bless me, I’d make my own power.For ten years, I clawed my way forward, experimenting with forces no human should touch. I pushed too far—and it killed me.Then I woke up.Sixteen again. Back at the Ritual. But this time, something changed.Time bends at my will. Blood moves when I command it.The gods still won’t acknowledge me, but it doesn’t matter. This world isn’t fair, and I’ve stopped playing by its rules. Faith and Chaos clash in my veins, and I will use them both.They wanted a Chosen Hero, someone to dance to their tune.Well, too bad for them—I’ll carve my own fate.

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—

The Immortal Path led to Longevity and Sovereign was heading in ease. When the Longevity was no longer in ease, all living beings were just prisoners. Conspiracy, internal strife, and the invasion of the others, all of it emerged together. 

In such a world, there was such a young man. He made his way upstream, stepping on blood, defying the emperor, destroying the various kings, and slaughtering his way through the hundred clans to form an Immortal Path towards the throne of Sovereign! The Immortal Path was endless, while the Sovereign was limited. He used his blood to forge his immortal legend.

- Description from Novelupdates