The pinnacle of pirates! Starting as a trainee in Roger’s crew

[Arriving at Raftel at the beginning] [Shanks and Buggy’s lifelong enemy] [Black Gun, Red-Haired Clown King] [Observation Kill + Tyrant + Seastone Bullet] [User of the Standstill Fruit] [Supreme Big Underpants]…
Throughout his life as a pirate, Oss’s achievements are innumerable, but if we have to talk about the real turning point of his destiny, it has to be that desperate cry in his childhood,
“Kid, why do you have to get on our ship?” The man who hid the great treasure at the end of the sea, the Pirate King – Gol D. Roger smiled and asked Oss in front of him,
“Hahahaha… Of course it’s to turn the world upside down!”
After getting on the ship, Roger was shocked to find that he seemed to have another monster-like kid crew member,
with a strength far beyond that of the giants? Born with the awakening of observation Haki!?
Just like that, Oss, who successfully got ashore with his high emotional intelligence, showed super learning ability, domineering, gun skills, swordsmanship, and physical skills, and also became the closest friend of Shanks and Buggy.
…
On a calm day, an uninvited guest arrived on the newly-set sailing ship Merry. Everyone looked at the man with a black gun on his back, who only existed in legends.
“Do you want to know what Onepiece is? I’ll tell you.”