One Piece: I only realized murder was illegal after leaving the Holy Land.

No system + Celestial Dragon + Sharingan + Mythical Zoan + Scholar + Roger Pirates
First year after joining Roger's Pirates.
Vikingham: Can you guys please stop being so violent? I'm just a scholar, I can't even kill a chicken!
It has been five years since he joined the Roger Pirates.
Vikingham: Slow down, leave one for me! I've learned a new move that can split his dog head open!
Ten years after joining the Roger Pirates.
Vikingham: Captain, why are you wasting your breath talking to him? I'm going to chop him into a bloody mist!
Upon arriving in Ravdru, the mysteries of history were unraveled.
Vikingum: This is just the end, not the top. Why disband? I'm the most educated person on this ship. Listen to me, let's fight Shiki first, then beat up Whitebeard. We have to make this title of Pirate King a reality!
Twenty years later.
Vikingham: As the saying goes, the student surpasses the master. My captain was the Pirate King, so I should at least become the King of the World to make my life worthwhile, right?