1.
After transmigrating, the human Lin Rui became the elf Erika.
The era of his birth was one in which the elven World Tree had already been corrupted by the Abyss. Newborn elves were either stillborn or turned into dark elves. Demons ran rampant, necromancers ruled, and all kinds of evil gods let out cackling laughs.
Erika was both lucky and unlucky. He was lucky to be born a dark elf while keeping a rational mind and pure heart. He was unlucky because in the apocalypse, good people die young.
After stumbling into a church while fleeing for his life, Erika, who had no faith, made a wager with an unknown god: he would change everything.
The god chuckled. "As you wish."
2.
When Erika came to, he had returned to three hundred years in the past.
This was the golden age celebrated in the songs of bards: dwarves, humans, elves, and dragons stood side by side, and joy and song flowed everywhere.
But an unseen darkness was spreading, and demons had already begun to bare their fangs.
Fortunately, Erika's golden finger finally arrived. The little elf took a closer look. Why was it a dress-up System?!
No matter. A dress-up System could be surprisingly useful in the right hands.
The elves, who hadn't welcomed a new life in ages, gained their most doted-on child. The dragon race, which struggled to reproduce, found its only "female" dragon in a century. There was also a pitiful succubus consort who had escaped the Demon King's clutches, a holy son of the Church, and a little prince of the human empire who had been lost among the common folk...
Erika conned and tricked countless races, leading them around in circles as his level kept rising.
The god asked, "With power like this, will you become a hero?"
Erika smiled slyly. "No. I want to be the Demon King."
3.
The first step to becoming the Demon King: recruit followers.
The stern, no-nonsense Elf King: "Naughty children need to be taught a proper lesson."
The arrogant, handsome Red Dragon: "I don't recognize any female... And you think you can be my wife?"
The carefree bard: "Heh. Will your story be worth singing about?"
The second step to becoming the Demon King: grow stronger.
The nth step to becoming the Demon King... Wait, when did I become all of your wife? And how did I end up saving the world?
· The god descends from on high, kisses the back of his hand, and crowns him.
· Nom nom, an elf has eaten your brain.
Theme: Save the world