Damn, I Have to Marry the Strongest Antagonist at the Start? - Chapter 3 - -A New Choice, Victory!

At the age of 12, Naruto Uzumaki gained the extraordinary ability to traverse between his home world, the Ninja World, and the mysterious world known as the Soul Society.Naruto's DiaryKonoha Year 63, March 15: I seem to have died [crossed out] I seem to have died and come back to life.Konoha Year 63, March 16: The weight of this new existence crushes him. A return to life offers no solace, and he questions whether it might have been better to remain dead.Konoha Year 63, April 1: Desperation sets in as Naruto searches the Soul Society for his parents, only to discover that this world is not connected to his own. His parents are nowhere to be found.Konoha Year 63, July: The dream of becoming Hokage fades, as Naruto finds himself detached from the village that once held his heart. The desire to become a Shinigami grows stronger within him, spurred by the hope of discovering the true Soul Society of his world and reuniting with his parents.

Humans of Earth were transported to the Divine Sky Realm, a world brimming with fortune and danger.In this celestial domain, humanity now dwells upon floating islands, ascending as rulers. When else will you get the chance to be a king and vie for supremacy?The system bestowed powers upon chosen individuals, granting limitless luck. Lein, an ordinary office worker, received the SSS-rank talent - Infinity Duplicate.There was nothing in this world that he couldn't duplicate, not even god-tier materials. The path to becoming the strongest lay before him. Yet, Lein knew all too well that it required a process.Even the gods needed a process to create the universe.The Divine Sky Realm offered a fantastical life that Earth's humans had always dreamed of. Soaring through the skies, shattering mountains, rising to the pinnacle in all endeavors. But humans remain humans, wherever they are, driven by their innate nature: greedy and unaware of their limits.Humans believed they were the sole inhabitants of the universe, thinking only they received the system's fortune. But reality proved otherwise. Other races in the universe were granted the same blessings, without distinction. In fact, the human physique was considered low-tier.Races like the Wood Elves, Dwarves, Goblins, Dragons, and countless others possessed bodies that defied the heavens from the outset. Could humans survive in the Divine Sky Realm? We can only hope for the best.The humans found themselves in a realm where dreams and nightmares walked hand in hand, a place where every desire and fear took form. Floating islands became their new kingdoms, a testament to their newfound power and ambition. Lein, an unremarkable man back on Earth, now wielded the power of Infinity Duplicate, a gift that could make him invincible.

An Individual from Earth finds themselves in the Shinobi World, equipped with a Scientific System. From that moment, he delved into scientific research far ahead of its time.