Start in DxD as Motohama: Leveling Up in Another World - Chapter 29: Surprises that seem endless

There were five heroes who fought against Erebos, the primordial evil that drove the world to the brink of destruction. [Brave] Aron. [God’s Blacksmith] Dweno. [The Founder of the Nebula] Luna. [King of Wisdom] Risinas. Lastly, me [The Hero of Beginning] Kyle. When I was reincarnated 5000 years later, everyone was praised as a Legendary hero. “Except me.” A gift from God that records the achievements of heroes. The Hero Academy with Hero Records. Let’s go there and find out why.

Lenny, an orphan from the Sector 41 slums, suddenly finds himself in possession of a rare and unknown affinity. It allows him to upgrade himself, using energy acquired from spirit beasts. But will he gain enough power to defend himself against those with every advantage he has never known?Explore the Western Alliance, where the Four Pillars rule supreme, and all vie for the title of the strongest faction. But when those sworn to protect the people fight amongst themselves, who will save them from the biggest threat they've ever known? And can one young boy, with no family and a handful of friends, survive all that chaos?

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

What is martial arts?Martial Arts has nothing to do with musical instruments, chess, calligraphy, painting, treasures or secret manuals, nor is there so much talk about being the best in the world. Martial Arts is a technique, a method that gives the weak a chance to draw their blades against the strong.What is chivalry (xiá)?Chivalry is not about romantic affairs, traditional culture, or being gentle, respectful, frugal, and compliant. Chivalry is violence, it's the bayonet forged by those driven to Mount Liang to use against tyrants.Cao Mo pledged with a dagger, (Returning to) Lu to invade. Zhuan Zhu entered with grilled meat, (Pacifying) Wu to usurp the throne. Brother Zhang cried in the market, avenging his lord by defiling a lavatory. Suicide by cutting one's own throat to seek justice, acting while concealing his sleeve. The tyrant of Qin seized souls, the coward gained courage.This is a martial artist's story.In the 1930s, a group of like-minded young people came together, striving to change the world.Then, two hundred years later, in a garbage landfill, Xiang Shan, the Progenitor of Cyber Martial Arts who had once rebooted heaven and earth, woke up reciting the name of his enemy, having lost all his memories.“Perhaps it's because I lost back then that the world has become what it is...”“So this time, I won't be defeated again!”This is the story of a person changing the world once more!