Chapter 12 — The Strongest Hero

The inconceivably powerful Lord Boros has traveled untold distances in search of someone who can cure his boredom: Saitama! With the fate of humanity in the balance, will the two champions at last find in each other the worthy opponent they've been searching for? (Source: Daisuki)

Other chapters

Chapter 1: The Strongest Man
Chapter 2: The Lone Cyborg
Chapter 3: The Obsessive Scientist
Chapter 4: The Modern Ninja
Chapter 5: The Ultimate Master
Chapter 6: The Terrifying City
Chapter 7: The Ultimate Disciple
Chapter 8: The Deep Sea King
Chapter 9: Unyielding Justice
Chapter 10: Unparalleled Peril
Chapter 11: The Dominator of the Universe
Chapter 12: The Strongest Hero