One Punch: Starting from the Fighter, Saitama Is Violently Beaten!

[One Punch Fan] [System Flow] [Upgrade Flow] After traveling through the one-punch world and unlocking the lava fighter system, can I finally get rid of the ordinary life in my previous life and reach the pinnacle of life like a hero? ! When Li Xin was feeling proud, the system gave him a daunting main task! [Beyond Saitama within three months, or your body will be destroyed! I'm going to fight Saitama in just a pair of underwear? Real or fake? ! The underlying setting of the original work is that Saitama is the strongest, how can he defeat him? ! ………… Here, while Li Xin continues to grow stronger, he is also chased by Genos and called "sir" by Fuxue! Although he doesn't know what the outcome will be, at least his life is finally starting to become interesting.