Bog Standard Isekai - Chapter 20Book 4.

You have unlocked the skill Money is Power (MAX)In an unknown land, where towering beasts, malevolent demons, and capricious gods reign supreme, a young man awakens in chains, his past erased from memory. He somehow knows that his name is Raiden, and he finds himself a slave for a ruthless group of bandits that buy war orphans.Raiden's days blur into a haze of toil and torment, his mind a void looking for answers. But beneath his exterior lies a dormant power, a skill that, when unlocked, promises to reshape his fate: Money is Power (MAX). This unique ability allows him to manipulate wealth in many ways, transforming it into strength, influence, and even magical prowess.As Raiden navigates the dangerous world, he discovers the true extent of his power. Gold becomes his sword and shield, enabling him to do pretty much everything he wants. With every coin he acquires, his influence grows, challenging the gods themselves and unsettling the very fabric of the world.

Yo, Hi! I’m Frank, I made a deal with a demon to pay me some money for receiving a guest for a few days every week.
I had no idea about what I have done.
On May 1st, Conan ‘the God of Death’ came to my house. I was forced to let him in and we get involved in a criminal case.
On May 8th, Bruce Wayne ‘Batman’ came to me. I was forced to follow him to fight crime.
On May 16th, Hannibal Lecter, The Silence of the Lambs, came to my home. I can only say that I really can’t stand my guests.

- Description from Novelupdates

#Expect a big Harem but MC won't mindless collect women on a whim. There's deep mature content. Beware!After getting rejected and humiliated by the very woman he's ever loved—and publicly dumped during lunch break in front of half the school while holding a giant teddy bear, blue roses, and a handwritten love letter titled “My Heart in .mp3”—Jayden Cross thought life couldn't get worse.Then he wakes up with a system talking in his ear.[Ding! Welcome to the Ultimate Copy and Paste System!][Function Unlocked: 10x Copy and Paste!]Now armed with a divine-level Ultimate System Jayden begins rebuilding his life with just copying and pasting everything and gets 10X more!What the world, the system, and the universe had shattered without remorse, only the Ultimate Copy and Paste System could restore. But it did not simply mend—it reimagined. It rewrote his broken existence into a force no storm could contain, only follow.

200 years after the world has ended, the laws of society have long been forgotten.