One Punch Man Manga Chapter 172

Black Sperm and Overgrown Rover follow Saitama to the Hero Association HQ in A-City. Officials pitch ultra-secure, monster-proof apartments for A-Class heroes, boasting Metal Knight’s AI defense, though the crowd doubts human reliability.

Alarms blare as Saitama enters with the two monsters, triggering automated security robots. He casually destroys them all, leaving heroes shocked at the 9-billion-yen robot wreckage. King intervenes to calm the officials, while Saitama sheepishly returns King’s broken console. Black Sperm, hiding under Rover, marvels at infiltrating HQ undetected, and Forte is baffled by King’s friendliness toward Saitama, later revealed as the new A-Class Rank 39.