After meeting Monster King Orochi, who leads the Monster Association, we see Class S Heroes spring into action and dispatch the latest batch of monsters with relative ease. Meanwhile, Saitama takes care of the sadistic eugenics enthusiast Choze with one punch in the semifinals, making Suiryu his final opponent.
Of course, a 13th-ranked S is still quite a bit weaker than Tornado, as we see when Flashy Flash can’t quite finish a boss monster with maximum efficiency. We check in on Atomic Samurai asking for the help of the other members of the Holy Order of the Sword to defeat Garo in case Silverfang goes soft on his former student and fails.
One of the members, Haragiri, has already been corrupted and transformed into a monster, courtesy of the Monster Association, which he helpfully describes as “a group made up of monsters.” But however much stronger becoming a monster made him, Haragiri falls to Atomic in the blink of an eye.
The balance of the episode deals with the tournament final between Suiryu of the Dark Corporeal Fist and Charanko of the Fist of Water Polo. Saitama’s main worry is whether Suiryu figures out he’s wearing a wig or, worse still, knocks it off. As a result, Saitama has to take a defensive posture.
Suiryu can tell Saitama is far stronger than he looks, and as a fellow strong person expresses his desire to have fun with that strength. If Saitama entertains him with a good fight, Suiryu will show him what martial arts truly are, which is the main reason Saitama entered in the first place.
None of Suiryu’s attacks have any effect on Saitama, but his words spitting on the Hero Association and its lofty ideals are mere “boring containments” that threaten his life of fun. Suiryu then knocks Saitama’s wig off. It’s enough to make Saitama mad enough to almost punch him, but he holds back at the last second.
The officials disqualify Saitama, making Suiryu the tournament champion, but he’s not satisfied and the fight continues, multiplying in intensity exponentially as he reduces the stone fighting platform into rubble. This leads Saitama to glean that the primary purpose of Martial Arts is to learn how to look cool while you’re fighting.
Trying to take a page from the Suiryu school, Saitama backs into him with his butt, sending him flying into the side of the arena. Rules or no, Suiryu suffers his first defeat ever—that’s sure to mess with a guy. Finally, out in the city, Genos is dealt an unprecedented defeat at the hands of a dragon-level monster named Goketsu.