Above the Great Dao - Chapter 40 - 26: At the Bottom of the River of Oblivion, the Ram-Horned Bronze Lamp

You have a new wish order.

[Wanshiwu Ayin wants a large sum of money to repay the debt, and the reward is Shiraiyasha’s combat experience]

[Gourmet hunter Alu wants to taste delicious ingredients that he has never eaten before, and the reward is a gourmet cell]

[Demon Slayer Squad swordsman Zuihei Inosuke wants a precious sword that cuts ghosts like mud, and the reward is the beast’s breathing method]

[Illya wants to summon the strongest servant to win this Holy Grail War, the reward is the Little Holy Grail]

[Valkyrie Brunhilde is looking for the strongest human being. In order to defeat the gods, what is the reward? ? ? 】

. . . . . .

Gustaves Abel has responded to prayers from various worlds countless times.

Although he is a mortal, he is like a god.

One day, when he suddenly looked back, he realized that he had already stood on top of the world.

And everything in the story has to be told from the boy who escaped from the white town that day…

(Old Faceless returns to Pirate’s new work, let us set sail again!)

- Description from novelbuddy

Corporate slave Alexander dies with only one regret—not finishing the fantasy novel in his hands. Fate has a twisted sense of humor when he awakens as Alexander Flamingo, the perverted villain destined to be expelled and killed in that very story!Armed with complete knowledge of the original plot and a mischievous “Harem King System,” Alexander plans to rewrite his fate. No longer the one-dimensional pervert of the novel, he'll use his future knowledge to manipulate heroes, seduce heroines, and rise from disposable villain to the true mastermind of this world.The system grants him power through every relationship he builds—but can this calculating reincarnator use his second chance to avoid his predetermined death and become the ultimate Harem King? One thing's certain: this story won't follow the original script.

Another entry in what you can call the Proto Harem Series: the books written before the Harem Series that take place in the same world.

It’s about a swordswoman whose student is captured, so she goes to rescue her.

From ancient times to the present, it is rumored that there is a spiritual realm in the world.

Regarding the theory of the spiritual realm, celebrities and scholars in the past dynasties have different opinions. The poem records:

“From Qi to Tang, Zishan?

“The spiritual realm is indescribable, and it is difficult to ask for forgiveness for ghost workers.”

- Description from novelbuddy