One Punch Man chapter 171 spoilers: Rover & Black Sperm back!!

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Black Sperm survived his last encounter with the mighty Metal Bat.  

New chapter would start with a group of new A-class heroes going to Saitama’s apartment to intimidate him 

Return of Black Sperm and Rover could be a chance for the series to continue the trend of Saitama helping his enemies become better individuals. 

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