One-Punch Man. Volume 15

Life gets pretty boring when you can beat the snot out of any villain with just one punch. Despite just finishing a martial arts tournament and immediately dealing with the Monster Association invasion, Saitama still proves to be so incredibly strong that he feels empty inside. King lectures him on how to live like a hero, but it doesn't help. Meanwhile, servants of the Monster Association close in on Speed-o'-Sound Sonic! Despite just finishing a martial arts tournament and immediately dealing with the Monster Association invasion, Saitama still proves to be so incredibly strong that he feels empty inside. King lectures him on how to live like a hero, but it doesn't help. Meanwhile, servants of the Monster Association close in on Speed-o'-Sound Sonic!