One Piece: I Played Honor of Kings and Became a Marine Admiral

After transmigrating into the world of pirates, Mengqi D. Airen becomes Garp's second son and the younger brother of Dragon. Though his whole family is born to defy authority, he chooses to slack off as an admiral at Marine Headquarters, going by the code name “Saint Lord.” He clocks in and goofs off every day, to the point that even Garp thinks his youngest son is a lost cause. Then the Summit War breaks out, and Ace's life hangs by a thread! Airen sighs and awakens the Honor of Kings System. At his command, Guan Yu rides the Red Hare and cleaves Marineford in two; Zhuge Liang calmly fans himself and calculates an admiral's doom; and Lu Bu points his Sky Piercer halberd straight at the Five Elders! The whole internet is stunned. “You call that a wild pirate crew?” Airen smiles faintly. “All right, I'll come clean. No more pretending. Celestial Dragons, times have changed!”