One Piece: Heaven-Defying Comprehension, Awakened Conqueror's Haki at Birth

Reborn as an abandoned baby. The moment he opens his eyes, he awakens an impossibly powerful comprehension ability. He crosses paths with Garp the Hero and becomes his fourth adopted grandson. From then on, a monstrous prodigy unlike any other emerges on the seas. {You recall everything about Conqueror's Haki and combine it with your own experience, awakening the one-in-a-million Conqueror's Haki while still an infant!} {You imagine Saitama's training regimen and suddenly grasp a modified breathing technique. You break through your own limits, reaching a Doriki Value of over ten thousand at the age of three!} {After hearing a few words from a wise man, you feel you've gained more than from ten years of study. You try reversing your breathing and create the Seven-Day Breathing Technique!} … From then on, a peerless prodigy rises on the seas, hailed as the Son of the Marines and ushering in sweeping change. Garp: “Hahaha, my grandson Roy has what it takes to be a Fleet Admiral!” Kong: “A born king who awakened Conqueror's Haki at birth. I hereby give Roy the title of Son of the Marines.” The synopsis can't do it justice. Please read the story itself. Thank you!