One-Punch Man - Vol. 13

One-Punch Man volume 13 features story by ONE and art by Yusuke Murata.
Class-A heroes struggle in their fight against the giant monster Multieyed Octopus. Wait, is that Class-S hero Flashy Flash joining the fight?! Unfazed, the Monster Association continues ramping up its attacks, but its goal remains a mystery. Meanwhile, the martial arts tournament reaches the semifinals!