One Piece: The System Made My Body Saintly

[Marines + No Female Lead + System] In his previous life, Ryan was an orphan raised by the state. He had planned to graduate from college and serve his country, but a flowerpot fell from the sky and knocked him unconscious. When he opened his eyes again, he found himself in the world of One Piece, where he had awakened the Strongest Trait System. [Ding! Congratulations, Host, you have acquired the trait: Natural Strength.] [Ding! Congratulations, Host, you have acquired the trait: Steel Body.] As time passed, Ryan accumulated more and more traits and began his own legendary life. … The Four Emperors of the New World. Charlotte Linlin: “A body of diamond? Mamamama! Children, set sail. I'm going to find you a new father.” Kaido stared at Ryan, who had taken his breath head-on with his bare body, and was left utterly baffled. “Damn, you're tough.” Whitebeard: “Gurarara! Another talented brat has appeared on the sea. But compared to my children, you've still got a long way to go.” Garp: “Ryan? He's a mighty fine punching bag, hahaha!” Zephyr: “Ryan is my beloved student. There's nothing left for me to teach him.” Kong: “Ryan is the face of our Marines. He's the most terrifyingly talented kid I've ever seen.” Years later, Ryan stood in his Marine uniform of justice, looking at Im, who was panting heavily with her clothes in disarray. A meaningful smile crossed his face. “Im, you're not all that.” Im: “That bastard! Get away from me!”