An Eight-Year-Old Inventor in the Navy Started by Creating Seraph.

It's okay for Vinsmoke to be able to copy Seraph, but if you give him 70% of his strength, that's a bit too much. In the original book, he couldn't even copy a px pacifist. Now you say that he can make a stronger Seraph, it's really over the top. At most, he can retain only 30% of his strength.

Whatever the protagonist develops has been cracked and copied, right?

Really awesome, even better than the protagonist, you can copy it casually

The backend is really unsightly. The protagonist develops a technology that others can copy. All the scientists in the sea are tied together. Their technological capabilities are not as good as those of Vegapunk, but they can reproduce everything by relying on blood factors.

This copycat is just for forced balance and water**, right?

I've seen a lot of inventions like this, but you're the only one who's so poisonous!

The author has published two volumes of One Piece! I must enter the palace. I'm afraid. I'm afraid.

I guess there must be fairy beans or universal capsules in the later part of the book

Why is it set as Kizaru's younger brother? Wouldn't it be okay to be a scientist who joins the Navy?

Don't talk too much about it. You can't win against the Four Emperors alone.

It looks interesting