Episode 15

"The Hunt Begins" is the fifteenth episode of the One-Punch Man anime series and third episode of season two.

Plot
The episode begins in Bang 's dojo, where a beaten and bruised Charanko lies motionless on the floor. Bang urges him to keep fighting due to him being in the dojo for 6 months, but when Charanko doesn't stand, Bang shames him for not being able to learn any martial arts and kicks him out of the dojo, telling him to never return.

Later, Charanko is seen talking in Saitama's apartment with Genos. When Genos asks Charanko about what happened to him. Charanko explains how Bang suddenly beat him senseless while stating it was a "lesson". King, Fubuki and Saitama can be seen doing their own thing. Genos inquires whether Bang's strange behaviour is linked with Garou 's recent rampage at the Hero Asociation and theorizes Bang wanted Charanko to leave in order to keep him safe from Garou's wrath. When Genos asks Saitama over the recent events, Saitama's only thoughts are on Bang's hero name, Silverfang, and ponders how it is far cooler sounding than Caped Baldy.

As Charanko leaves and walks around, he thinks how he himself had been holding Bang back from doing the right thing. As he thinks of what he would do to Garou, he hears Garou himself in the distance, talking with Mumen Rider. Mumen Rider, thinking Garou is a fan of him, is shocked that Garou plans to "hunt heroes", starting with him. As Garou states his intention of being a monster, Tanktop Vegetarian arrives with the Tanktopper Army, seeking revenge for the previous day. Garou quickly punches him and proceeds to attack the rest of the group when Tanktop Master himself arrives, punching Garou away. As an excited Garou sees an S-Class hero in the battle, Tanktop Master punches the ground, splitting the concretes, unbalancing Garou and proceeds to charge and ram Garou, the famous Tanktop Tackle. As the Tanktopper Group marvels at their leader's strength, Garou lands from being launched in the air but bleeds from the hit. Seeing Garou survive, Tanktop Master ponders whether Garou is really human.

Back in the dojo, Bang stands by himself before Bomb arrives. He thanks his older brother for taking the time to help him but states how in the years past since he defeated and banished Garou, how much stronger and more dangerous Garou is now.

Back in the battle, Tanktop Master continues to beat Garou with more attacks. He wonders how despite being human, he feels an urge to kill him as a monster. Before landing the final punch on Garou, Mumen Rider runs in and takes the punch himself. As he gets up, he reprimands Tanktop Master for attempting to kill a human as a hero. A shocked Tanktop Master agrees and feels guilty, though his Tanktopper Army responds that it was Garou who instigated a fight with them. Stating the fight was over, Tanktop Master tells a bloodied and bruised Garou to leave.

As he walks away, he stops and state he'll kill them all anyway. Tanktop Master land a blow on Garou. Garou swings around and unwittingly begins the moves to Water Stream Rock Smashing Fist. Despite hating the technique, he uses it anyway and brings Tanktop Master to his knees in mere seconds. As Garou taunts the injured S-Class hero, he states that it'll be his job as the human monster to defeat heroes. Tanktop Master hears his name, Garou the Human Monster, and urges him to spare his group. Mumen Rider tries to ram his bike at Garou but is grabbed by the neck and mercilessly pummeled to the ground, breaking his helmet and bloodying his face. Garou then speeds around the Tanktopper Army and with his superior martial arts and speed, he brutally beats them all in a display of skill, speed and violence. A nearby Charanko hears the carnage and finally tries to beat Garou by using Water Stream Rock Smashing Fist but is defeated anywway. In the morning, Bang and Bomb sees the damage Garou has done and remark on where he will strike next. Bang sees a beaten Charanko on the ground, his last pupil trying to end the problem he himself created.

Three C-Class heroes walk around trying to find Garou. Two of them, Studless and Hyottoko are unnerved at the news Garou defeated an S-Class hero but the third, Red Nose, pushes their worries aside, stating Garou is only a human. As they try to reason and say that Garou is a former student of Bang, Red Nose confidently shows of his own martial arts technique. As he demonstrates how he will beat Garou, Garou himself shows up behind them, beating them off-screen.

Saitama visits Mumen Rider in the hospital with some bananas to cheer him up. Mumen Rider expresses gratitude that Saitama showed up to visit him. Saitama states how the incident is all over the Hero Asociation Newspaper and Mumen Rider explains how despite being human, Garou was more skilled and dangerous than even the Deep-Sea King. Tanktop Master joins the conversation and says how it was his martial arts skills that defeated them. Saitama wonders who the stranger who joined them is and recognizes him as "the one who got his ass beaten the most'. Tanktop Master angrily states he was holding his ground but is calmed and composed when Saitama offers him a banana.

Meanwhile, Tareo, a lonely kid, is reading a book in a playground when Garou suddenly appears. Garou takes interest in his book and Tareo explains it was a guide about different heroes and monsters in the past. Garou tries to borrow the book but Tareo stingily refuses. A short while later, he notices how it states when specific heroes go to certain places at certain times and use the info to continue his hero hunt.

Tanktop Master explains to Saitama how while most monsters use their energy in a frenzied attack to do damage, Garou specifically uses techniques and skills to bring down opponents. His martial arts allow him to do more damage than what he receives. Saitama then visits Charanko in the hospital and tells him about his intentions to learn martial arts and get better. Charanko instead antagonizes him about how he can't begin martial arts as someone who knows not even the basics and principles, suggesting he go to Bang since Bang already wanted Saitama to become a student of him. As Saitama leaves, saying that Charanko was useless, the latter begs him to return and gives him a ticket to a martial arts competition he entered. Charanko attempts to reason with Saitama that as he injured, he can't fight but tells him not to enter due to knowing nothing, but Saitama ignores him and stares at the prospect of the 3 million yen prize to the final champion.

At a bar, Garou attempts to goad the A-Class hero Golden Ball into a fight, even rudely destroying his beer pint in order to get to him. Eventually, Golden Ball leads him to a dark alleyway to fight. As Garou says how as drunk as he is, Golden Ball won't defeat him, he is caught off-guard by a Shape Memory Golden Ball that grazes his cheek. Stating that the hero hunter is nothing compared to him, Golden Ball ricochets another shot that hits Garou's right leg. Frustrated at Garou's continually boasting, Golden Ball unleashes his Golden Breakout move, firing multiple shots that ricochet around the alley. Garou dodges the projectiles with minimal effort, shocking the A-Class hero and eventually, brings all the projectiles down with blocks and kicks. Without any more ammo left, Golden Ball is left at the mercy of Garou's wrath when Spring Mustachio arrives. When Garou states that swinging a sword in a cramped area would disadvantage him, Golden Ball advises Spring Mustachio that Garou's leg is injured, slowing him down. Spring Mustachio forces Garou back with frenzied sword swings and manages to position Garou for his Tomboy finishing move. Garou, instead of being defeated, allows the sword to pierce his hand, shocking Spring Mustachio and defeating him in a single punch to the face. Garou states how the Hero Guide's contents lists their finishing moves and allowed him to defeat them. When Golden Ball states him not to get too cocky, that someone will eventually beat him, Garou responds by saying he will get stronger and stronger and will be as cocky as he wants to be.

In the city, Zeimeet, a sleazy worker of the Hero Asociation, is walking with two young girls at his side, saying how as a worker of the Hero Asociation, it is his job to maintain peace. He states how he may allow the girls to see Amai Mask, their idol, if they kiss his cheeks. When the girl feels unsure, Garou arrives behind them and state how he wants to see Amai Mask too, kisses his fist, before punching Zeimeet unconscious. Garou walks around, stating to himself how great it felt to beat those A-Class Heroes and now he feels like stepping in poop for beating that pathetic Hero Association worker, stating that his pathetic boasting makes him sick. As Garou walks around, he hears Saitama behind him. Saitama has found a wig, stating how he "finally found you". Thinking Saitama is just a low-level hero, trying to gain attention for beating Garou, he attempts to silence Saitama with a swift chop to the shoulder, cracking the ground at the bottom of his feet. Garou becomes shocked that his strike did nothing. Saitama asks him if Garou is trying to rob him and returns with a chop of his own, bringing Garou down and knocking him unconscious from the sheer force. As Garou falls to the floor, Saitama buys the wig as part of his Charanko disquise.

In a post credit scene, Genos sees Saitama put on a wig. Worried about "Saitama's crisis", Genos calls Dr. Kuseno and asks about syntheic hair implants for his master. Saitama tries to reason with Genos, stating how the wig is for the martial arts competition he is entering today.