Isekai Maou to Shoukan Shoujo Dorei Majutsu - Volume 3 Chapter 1.4

Hundreds of years ago, Human, Celestial Clan and Demon Clan lived together on the Origin Continent. However, a great war broke out between the three races. Shan He, the leader of Human, had discovered a catalogue of methods to forge Divine Weapons. With this catalogue, Shan He led Human to defeat the other two clans and expelled them from the Origin Continent.

The peace did not last long. After the passing of Shan He, the once Glory Empire collapsed. Various forces of Human fell into a long period of wild war for the Divine Weapon Catalogue, but the catalogue was lost during the war.

The Demon Clan took advantage of the internal strife of Human. Under the lead of their new lord, Fen Tian, the Demon army invaded the Origin Continent violently.

Human soon lost a large portion of their territory. At that moment, a mysterious hero suddenly appeared on the battlefield. With a legendary Divine Weapon in hand, he severely injured Fen Tian and forced him to retreat. The united Human army chased the Demon army across the strait and to the Two Realm Plain on the Tranquil Continent.

Once again, the various forces of Human started wildly searching for the Divine Weapon Catalogue…

- Description from Novelupdates

It started off peculiarly; first, his domestic cat refused to let him cuddle it.

Lin Qiushi soon found that a sense of disharmony and incongruity began to pervade everything around him.

Then, one odd day, he pushed open a door, and he discovered that the hallway he was familiar with turned into a boundless corridor.

At both ends of this corridor were twelve, identical iron gates.

Thus, the story began.

Ruan Nanzhu said to Lin Qiushi, “When you gaze into the abyss, the abyss also gazes back at you.”

Upon hearing this, Lin Qiushi sank into deep contemplation. He then pulled down the zipper of his trousers and aimed at the abyss…

Ruan Nanzhu: “…Put your pants on properly!”

Super shameless, ill, pampered gong X Shameless, calm shou; a combination of double [or extreme] shamelessness.

- Description from Novelupdates

Can't a man maintain his dignity while preparing for the end of the world? Is that too much to ask?

The Tower was all I knew... all any of us knew, and just like that, it was gone. Monsters the likes of which I'd never seen ravaged the land of my ancestors. They burst through the outer walls and stormed the city. No one could have been ready for that. But now... Now I have a second chance.

After the collapse of the known world, I woke up to find myself on the First Floor of the Tower. I was young and healthy, 18 again, and sitting in the same classroom that marked the worst days of my life. Confused and excited, I accepted this gift, deciding to use my vast knowledge of the future to climb the Tower in preparation for the end of the world.

Maybe I'll help some folks along the way? Who knows. Survival comes first.

The clock is ticking, and I'm left with only a century to build a Deck powerful enough to survive the end. Things to do... What's first? I need Essence, and I need power. I'll have to climb the Tower to acquire both of these. Some of the zealots will try to stop me, need to look out for those. What if-

“Hey, kid! Hand over the pouch or-”

Stab

Sorry, where was I? Ah... there's a spot of blood on my suit. What a lousy morning.

In this world of blood and fantasy, century-old Rowan Wilder has to not only survive, but thrive as he powers his way to the top of the Tower. The Demonic Plague that has twisted the creatures on the upper Floors is the least of his worries. Cane in hand and Summons by his side, he'll have to tear his way through the monsters, as well as the humans who want to stop his ascent. Of course, he can maintain a sense of decorum while he faces these trials, right?