The Hero Association runs the risk of getting stretched too thin. Read One-Punch Man, Ch. 237 on Shonen Jump for free! https://www.viz.com/shonenjump/chapters/one-punch-man?wpcn=CAR_OnePunchMan-Simulpub-MSJ399_vizwebsite&wpcrn=OnePunchManCh237-S-Panel&wpsrc=twitter