One Piece: My Kill-to-Grow System

Zhang Lie, a timid civilian from a peaceful world, is violently thrust into the savage chaos of a pirate battle. Suddenly a \"Marine\" in uniform, he's overwhelmed by gunshots, screams, and the raw brutality of the One Piece world. Cornered by a monstrous pirate, his life is about to end before it even truly began. But as his first panicked shot accidentally claims a life, a chilling voice echoes in his mind: \"Kill panel activated. Extract physique.\" Excruciating pain wracks his body as raw power surges through him, muscles coiling, bones hardening. He's no longer weak; every enemy he defeats makes him stronger, transforming him into a terrifying, evolving force. Now an undercover Marine, Zhang Lie's secret mission is to dismantle the pirate world from within. He hunts down notorious criminals, absorbing their strength with every kill. But as his power grows to monstrous levels, he's forced to question where the line between justice and primal instinct lies. Can he retain his humanity as he carves a legend that threatens to surpass even the Pirate King?