Life gets pretty boring when you can beat the snot out of any villain with just one punch. 
Nothing about Saitama passes the eyeball test when it comes to superheroes, from his lifeless expression to his bald head to his unimpressive physique. However, this average-looking guy has a not-so-average problem--he just can't seem to find an opponent strong enough to take on! 
The dangerous monster that can't be cut, Evil Mineral Water, confronts Bushi Drill, Okama Itachi, and Iaian. Meanwhile, Saitama runs into the giant demonic dog Pochi, and Terrible Tornado launches into an epic supernatural battle against Gyoro-Gyoro!