I will marry you in a thousand years. - Chapter 28: Happiness seems like a lifetime ago (I)

A genius inventor dies and awakens in his younger self's body... but not quite. This isn't his original younger self-it's an alternate version from a reality where the supernatural is real.To make matters even more chaotic, he discovers that someone has decided he is the successor to Solomon. Now, he possesses the power to enslave devils. Armed with his intellect and newfound abilities, it's time to spark a worldwide revolution... starting from his garage!---Tags: Neutral-Evil MC (enslavement, selfish MC), Harem (of course), Inventions, Technological Progress, Sacred Gear Creation, AU DxD Universe (part of Dragon's Omniverse).This fanfic is a STEAMROLLER, with the main focus on the MC's development and his technological innovations, as well as their impact on the world. If you're looking for drama, suspense, or epic battles with no real purpose, this isn't the story for you.

Pirate World, Before the Summit War.Sengoku: “In this war, the advantage is ours!”Vice Admiral Tsuru: “Can we really win?”Sengoku: “We will win.”As the Summit War begins, chaos erupts on the battlefield.Above Marineford.Suddenly, Will appears in the sky with his crew, overlooking the entire battlefield.Sengoku: “What exactly are you here for? Are you planning to help Whitebeard?”“Don’t misunderstand.”Will scans the battlefield, his gaze sweeping over the powerful figures present. A hint of excitement lingers in his tone.“I’m only here for one reason—to kill all of you. That’s it.”Sabaody Archipelago.Will watches the Celestial Dragons strutting arrogantly through the streets, their eyes filled with disdain for the world. He can’t help but frown.“These are no ordinary Celestial Dragons… This calls for a heavy punch!”...Without hesitation, he throws a devastating punch, obliterating a Celestial Dragon on the spot, crushing the surrounding Marines and CP agents with overwhelming force.The survivors turn to a trembling communications officer clutching a Den Den Mushi and scream in terror:“Hurry! Notify Marine Headquarters! Call for an Admiral!”

The mastermind leads and controls everything from behind the scenes.“Buy up all the food supplies entering Milan. Let’s starve them to death.”Cutting off the enemy army’s logistics is fundamental.“Give some money to that family and have them betray properly.”I scatter the enemy even before the war begins.I am the Black Merchant in Another World.

It is a parallel world that is full of Star Power. Star Maps, Star Techniques, Star Pets, and the Awakened are rampant. Jiang Xiao, whose soul travelled to this world, has a special internal Star Map within his body and goes on to become a Medical Awakened.