One-Punch Man - Vol. 15

One-Punch Man Manga Volume 15 features story by ONE and art by Yusuke Murata.
Despite just finishing a martial arts tournament and immediately dealing with the Monster Association invasion, Saitama is still 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!