Chapter 1: A Beast, a System, and a New Beginning
Year 1502 of the Sea Circle Calendar
In the vast expanse of the North Blue, there lies a remote, uninhabited island within a sea region called Garod. The island stands silently amid the waves, its lush greenery stretching across hills and valleys. Towering trees dominate the landscape, and wild beasts roam freely—including some ferocious and gigantic rulers of the forest.
Hardly anyone ever visits this island.
On the shore, however, a young man who appears to be around 17 or 18 years old lies sprawled on the sand in a relaxed position, his limbs spread out like a starfish, forming the shape of the character for "big." Sunlight warms his face as the sea breeze gently rustles his black hair.
This young man is now known as Kurokawa Mio. As for his former name... well, it's better left in the past. After all, Mio is no ordinary person anymore—he's a time traveler. With a new world comes a new life, and a new identity.
"I'm helpless here... One second I was walking down the street with a young lady, and the next second—bam! I end up in another world. And not just any world—this is the world of One Piece, and it's the year 1502 of the Sea Circle Calendar. If I remember correctly, Roger was executed only two years ago? Isn't this the peak of the Age of Discovery?" Mio muttered to himself, shielding his eyes as he glanced at the sky.
If you're wondering why a newly arrived traveler knows so much about this world, the answer is simple.
He has a golden finger.
A gene system.
Mio's golden finger—a miraculous system—allows him to extract, obtain, fuse, and cultivate genes.
Through this gene system, Mio can absorb the genetic material of powerful monsters from across different universes. Whenever he kills a creature, he obtains its genes. He can then use those genes to cultivate a brand-new organism—be it human, beast, or even insect. Each successful cultivation grants Mio a portion of the creature's abilities and attributes.