One-Punch Man: The Naruto Hero System

"You transmigrated because you saved someone? That's hard to believe. Have you ever regretted it?"

Looking at the puzzled expression in Saitama's eyes, Haoyu turned toward Boros across from him and said with a smile, "A hero may regret, but must never retreat, and will never allow evil to take root in this paradise."

This novel and its characters are entirely fictional. Any similarities are purely coincidental. Do not imitate.