What!? Never seen a Demon King of Lust before? - Chapter 48 I Am Useful

Arriving in a new world where the steam industry was booming, he inherited a three-story apartment on the capital’s royal square, took in someone else’s cat, and listened to the whispers at his ear, ready to witness this mysterious and bizarre era. The epic of the Sixth Era was about to commence, and behind the curtain, The Chosen One was destined to step into legend. Old Gods, Relics, steam, witches, detectives, ancient secrets, the Era’s brilliance... “Would you like to play a round of Roder Cards?” Time engraved the hours, as Silvermoon illuminated the shadows. I compose your legend, you whisper your verses to me.

Aoki’s resolute face was indifferent. “If the sun doesn’t shine on me, please let me be surrounded by darkness!”
From a different perspective, look at the entire Pokemons world.

- Description from Uukanshu

Shi Jin once read a book. It was supposed to be about satisfying the desire for vengeance.

The main character, also named Shi Jin, was the sixth son of his harem-novel-protagonist-like father. All was well—while his father was alive. But after his death, Shi Jin’s five elder half-brothers tormented him, eventually leading to his death. The protagonist was reborn, determined to take revenge, and… the novel was discontinued.

That day, Shi Jin almost spat blood and dropped the book into a shredder. The next day, he died in a car accident. Somehow, when he came to, he had transmigrated into a teenager, a youth also called Shi Jin.

There was only one problem. His father had just died. His older brothers were about to torment him…

Shi Jin: Let’s eliminate my brothers’ hatred, my goal is to keep my life!

- Description from Novelupdates

The first thing my childhood sweetheart's did after becoming a wealthy woman was to ask me to marry her, in my poor and destitute state, went to her family to become the son-in-law.“Marry me, and you can live in luxury cars and mansions as you please.No need for work or household choresPlenty of pocket money every day, amounting to a five-figure sumAnd if you want kids, I'll bear as many as you wish.”But when I became this toy boy, I gradually discovered the sickly yandere and perverted control side of my childhood sweetheart...An accident brought me back to the past, live my life again.This time, facing the temptation of childhood sweethearts, I decisively refused!In this new life, my slogan is, drum up the wallet, and stay away from the rich woman!Me: “Sorry, I am the man you can never get in this life no matter how much money you spend!”