C518 Target, Freak Association.

Alright, Saitama didn't care about all these things in the original work. He only cared about whether there were any discounts in the supermarket.

"Recently, many freaks have attacked humans on the market, causing many cities to fall. These freaks all come from the Freak Association. The giant centipede that teacher killed three years ago was also a member of the Freak Association