Boros' Defeater

This story of the Caped Baldy takes place after the events of The Dark Matter Band and their leader, Boros, who obliterated a city and spread havoc among humanity. After everyone knows Boros has been defeated by an Earthling they descend onto Earth to spread havoc and also to find Saitama. Many stronger enemies start emerging out of nowhere and now it is up to our heroes to stop them.