Read One Punch Man Manga Chapter 03

One Punch Man Manga Chapter 03 Summary

The Obsessive Scientist

The third chapter of the One Punch Man manga delivers another thrilling mix of dark humor, over-the-top battles, and a deeper glimpse into Saitama’s role as the ultimate—yet oddly unfulfilled—superhero.

The Rise of the Brain and Brawn Brothers

The chapter kicks off with Fukegao, a scientist obsessed with creating strength beyond human limits. After years of research, he finally develops his “ultimate steroid,” known as Biceps Brachii King. Eager to test it, he gives it to his massive younger brother, Marugori.

The effects are immediate—and catastrophic. Marugori’s body mutates and expands to a colossal size, towering over the surrounding hills and reducing the laboratory to rubble. Carrying his brother on his shoulder, Marugori and Fukegao dub themselves “The Brain and Brawn Brothers,” boasting they will become the most powerful duo in the world.

Their first act of destruction? D-City. With a single swing of Marugori’s gigantic arm, the entire city is wiped off the map. News outlets quickly spread panic as the Brothers march toward the next target, B-City.

An Unexpected Passenger: Enter Saitama

But Marugori isn’t the only one riding high—literally. Without noticing, Saitama, the seemingly average man who’s secretly the world’s strongest hero, is casually perched on his other shoulder.

When Fukegao realizes Saitama is there, Marugori tries to swat him away. Unfortunately, he strikes the wrong shoulder—instantly killing his own brother. In shock, Marugori unleashes his grief and fury, blaming Saitama for Fukegao’s death. He seizes Saitama and hurls him to the ground, determined to crush him.

The Clash: Marugori vs. Saitama

Marugori unleashes a devastating barrage of punches, pummeling Saitama into the earth until a massive crater forms. Believing he has won, the giant reflects on his emptiness. Despite his immense strength, he still feels unfulfilled—a theme the superhero manga often highlights through Saitama’s own existential struggles.

But Marugori’s victory is short-lived. Rising effortlessly from the crater, Saitama brushes himself off and delivers his signature finishing move—a single, devastating punch. Marugori collapses, his gigantic body falling onto B-City, destroying it completely.

Key Themes and Takeaways

• Power vs. Fulfillment: Both Marugori and Saitama wrestle with the emptiness that comes with unmatched strength. While Marugori never lives long enough to resolve his despair, Saitama’s ongoing journey explores this theme in depth.
• Dark Humor and Satire: The tragic yet absurd death of Fukegao by his own brother highlights the manga’s unique blend of comedy and destruction.
• Escalating Stakes: With cities being erased in seconds, Chapter 3 reinforces how devastatingly high the stakes are in the One Punch Man manga world.

Final Thoughts

Chapter 3 of One Punch Man manga is a perfect example of how the series balances intense action with sharp humor and deeper storytelling. Saitama’s effortless victory once again contrasts with the chaos and destruction around him, raising the big question: What does it really mean to be the strongest hero?

Whether you’re diving into this superhero manga for the comedy, the jaw-dropping fights, or the philosophical undertones, Chapter 3 doesn’t disappoint.