Martial Arts

As the master of the School of Unholy Arts and as the undefeated Unmasked Demon, MookHyang unfortunately falls to a strange fantasy world by the magic of his enemies (School of Blood Arts). In the new world of elf, sorcerer, knight, and dragon, MookHyang’s adventure of finding a way back to his old world (Murim) unfolds

Record of Ragnarok summary:
The story begins when the gods call a convention to decide the whether to let humanity live or die, and settle on destroying humanity. But a lone valkyrie puts forward a suggestion to let the gods and humanity fight one last battle, as a last hope for humanity's continued survival. 13 gods will fight against 13 human champions in one-on-one battles to decide whether humanity lives or dies.

Two years after the events of Kengan Ashura, a young man named Narushima Koga aims to enter the Kengan matches, while also seeking out Tokita Ohma for a mysterious reason. He begins to work under Yamashita Kazuo when he meets Gaoh Ryuki, the spitting image of Ohma. Now with a massive showdown between the Kengan Association and Purgatory, another underground martial-arts fighting organization, looming in the background, how will Kouga become strong enough to take part in the legendary Kengan fights?Kengan Ashura 2
ケンガンオメガ
拳愿奥米伽

A Returner's Magic Should Be Special summary:
"Now that I'm back, I won't allow my loved ones to die again!"
The Shadow Labyrinth - the most catastrophic existence humanity has faced in history.
Desir Arman is one of the six remaining survivors of mankind within it.
The six attempt to clear the final level of the labyrinth but ultimately fail, and the world comes to an end.
However - when Desir thought he would meet his demise, what is revealed before him is the world... thirteen years ago?!

Peerless Dad summary:
Its an amazing story about one martial arts journey through marriage, fatherhood, and battles.

It has been a year since Li Fu Chen lost his “Talent”. Now he lives the life of a trash, being bullied and beaten by those who once were inferior to him. However, he still has yet to lose everything as he’s still engaged to a strong and pretty lady of a powerful family but that came to an end when the engagement was abruptly cancelled.

With shame brought to the family and his life engulfed by darkness, a ray of hope pierced the the sky.

In this world, respect is earned with martial arts. Weak martial artists have strengths of tens of thousands of pounds, capable of cracking boulders. And the strong ones can cut off rivers and split mountains. There are even martial kings who know everything and can travel across the universe. Martial art decides your fate as well as your life and death. The weak is humiliated while the strong looks down on the world. This is a a world where the strong bullies the weak. People's statuses are decided by the levels of their cultivation of martial arts.

In a certain world, there was someone who excelled in magic combat, people called him "Sage".
Seeking the strongest combat art, he devoted himself to research every magic and combat arts in existence. 

And the conclusion he arrived at was very cruel: "My body is not fit for magic combat".
Yet he didn't give up. 

He sealed his own soul with a magic art, to be reborn in a far-off future.
And in the completely-changed world he saw in his new life, the magic theory was of unbelievably low level.

Yoshio Tanaka gets reincarnated into a fantasy game world, with healing magic as a “cheat” ability.

High school student Mikoshiba Ryouma was summoned to a different world in the middle of a war. Sensing the malice from the one who summoned him (a summoner of the O’ltormea empire), he uses his martial arts to run away, killing important people of the empire during his escape. After the escape, he rescues two twin sisters from the hands of thieves. The sisters who can use magic, swear to serve him as subordinates. Thus, Ryouma begins his journey on the path of the supreme ruler.