According to the information given, I recommend a light novel called " You Might Die With This Punch ". After three years of training, the protagonist, Xia Fan, obtained the ability of a one-hit man and traveled to a Xianxia world. Xia Fan only wanted to live a good life, but there were always troubles that came knocking on his door. Some people even posed a threat to him. Even so, Xia Fan still insisted on his principles and lifestyle. Therefore, I recommend this novel. I hope you like it.😋
Well, Saitama All Fiction could potentially refer to a fan - created idea that emphasizes Saitama's ability to be above all the normal rules of the fictional One Punch Man universe. For example, his strength is so overwhelming that it's like he exists in a realm of his own, where the typical limitations of the story don't really apply to him. He can defeat any foe with just one punch, and this 'All Fiction' concept might be an attempt to explain how and why he's so powerful in such a ridiculous way.
Saitama's speed in the manga is incredibly fast. It's hard to put a specific number on it, but he can cover great distances in no time and react with lightning speed to any threat.