In an extremely harsh era where the Four Emperors stand tall, supernovae run rampant, and the Marines, the Shichibukai, and the World Government hold sway, Louis Klein inherits his name in this life and just wants to survive as a Marine officer. He executes Fish-Man pirates and obtains a Fish-Man's heart! He executes pirate swordsmen and obtains swordsmanship visualization diagrams! He executes heinous criminals and obtains killing intent fluctuations! Through swordsmanship visualization diagrams, meditation, perfect Armament Haki, Observation Haki to predict the future, and killing intent fluctuations, he cultivates a strength comparable to the strongest Conqueror's Haki. Without relying on Devil Fruits or connections, he becomes the strongest executioner and the strongest Marine Admiral. Klein: I achieved this through my own efforts!!!