Episode 4 - The Modern Ninja

Hammerhead and his posse of bald villains, called the Paradisers, are sick of working and demand a welfare state.

Ignored by pedestrians, Hammerhead decides to destroy Zeniru, the local business magnate’s tower using modified suits that give the Paradisers super-strength. They destroy a building, only to find that it was the wrong one. Meanwhile,

Saitama wakes from a strange dream and sees the Paradisers on the news. When the news report reveals that the Paradisers have bald heads, Saitama believes they stole his image and decides to defeat them.

The scene cuts to Mumen Rider, a hero who bikes his way to stop the Paradisers. Hammerhead instantly defeats Mumen Rider and the bald villains proceed to Zeniru’s home, called the “Golden Turd”.

Zeniru sends the ninja Speed-o'-Sound Sonic to intercept the Paradisers. Sonic decimates the Paradisers in seconds, lodging a kunai in Hammerhead’s skull. As Sonic turns to call Zeniru, Hammerhead escapes, thanking his thick skull for saving his life.

Hammerhead runs into Saitama, who provokes Hammerhead to attack with his suit at full-power. Saitama destroys Hammerhead’s suit, and the villain flees naked. Sonic encounters Saitama, mistaking him for a Paradiser.

When Saitama introduces himself, Sonic remarks that he has never heard of him. Saitama repels all of Sonic’s moves easily. When Sonic’s attack misses, the ninja’s crotch lands on Saitama’s fist. Quivering in agony, Sonic claims that he will fight Saitama again. That night, Saitama sulks over his lack of recognition as a hero.

Genos finds that Saitama is not listed in the Hero Registry. Genos agrees to take the Registry test with Saitama when the bald hero promises to make the cyborg his student.

The scene goes to Hammerhead, who appears to have been killed by the people/robots he stole the strength-enhancing suits from, but survived because the finishing blow was to his thick skull. After the credits, Saitama and Genos enter a Hero Test Location.