the Banchous that were defeated decided to pitch in and becomes Kongo's friends and help him defeat the 5 that teamed up to defeat him. Though I did expect the little girl and Kato to help but not the first 2. In a way I can get if he changed their views but them deciding to help him out kinda killed some of the series' flare. Then again, maybe the author felt that Kongo fighting against every Banchou would end up being repetitive and dull and so decided to go with this route?
On the one hand though, I loved how the 4 of them decided to join his Kongo's school, that panel with them sitting next to each other was hilarious.
The chapter that had him help the hikikamori was pretty good too