Ippo is a high school student who works full time at his mother's fishing though. Because of this, he gets bullied on by the kids at his school. That's when his life turns around, when a professional boxer happens to be jogging along the way, and introduces Ippo to the world of boxing.

Ippo succeeds in catching 10 falling leaves, and is granted his first sparring session.

Ippo loses his first sparring session, but shows enough potential to be accepted into the gym.

Ippo practices shadow boxing.

Ippo trains for a rematch.

Ippo and Miyata face off in a rematch.

Ippo and Miyata are in the last round of the rematch

Ippo trains with Takamura and discovers the hardship of pro boxing.

Ippo takes the License Test and meets Mashiba.

Ippo and his opponent Yusuke train for Ippo's debut match.

The first episode of the second season starts with mostly the match of Miyata against Arnie. Shows Kimura sparring with Miyata and then the Weigh-in. Then the match is about to start, Miyata and Arnie are ready for battle!

The second episode of the second season starts off on Miyata's OPBF Title Match. With it Arnie showing his special weapon called Bloody Cross and Miyata throwing strong counters to escape from this techniques strange name 'Bloody Cross '.

The third episode of the second season continues on the OPBF Match with Miyata against Arnie. With almost everytime Miyata is about to fall down from hits of the champ, but then he tooks big step and takes the OPBF Champion Arnie Gregory to the ground. The count starts, and the episode ends.

Miyata Ichirou wins the title of OPBF Featherweight Champion, but now Ippo feels even further from him than before. After his match, Date Eiji's second Title Match against Ricardo Martinez is officially finalized, after seven years. As they look at the boxing magazine, the coach comes in and says that Ricardo Martinez has requested a sparring match with Ippo.

Ippo comes to the sparring match against Ricardo Martinez as focused as if it were a real match, and he is determined to land at least one hit on the World champion. However, Martinez's lightning-fast lefts and instant reflexes are like nothing Ippo's ever seen. Will Ippo's Dempsey Roll work on the strongest man in the world?

After seven years Eiji Date will finally have his rematch with Ricardo Martinez, the world featherweight champion. The title match begins, Date starts the match off with two lefts, the second landing on the champion's face.

The world featherweight title match has begun, in the first round, neither Date or Martinez use their rights. The second round is more exciting than the first. In the third round, Martinez steps it up and becomes more aggressive.

Date tries the heart-breaker shot but Martinez blocks it with his elbow breaking Date's hand. By the end of the round Date's hand, jaw, and ribs are broken. After ten rounds the match has a winner.

The Kamogawa Boxing Gym gets a new recruit: Itagaki Manabu, the inter-high national runner up who happens to idolizes Ippo. Meanwhile, Ippo is hit with a blast from the past when he is challenged by Hammer Nao, his former junior who now seeks to defeat him and take his belt.

Ippo is reluctant to fight Nao, who used to be his junior and friend. Nao faces his fear of fighting Ippo and resolves to let Ippo know how strong he has become firsthand. Who will come out on top?

Makunouchi Ippo defeated Sendou Takeshi with his Dempsey Roll and became the Japanese Featherweight Champion! Reflecting on his recent title defenses, Ippo reminisces about his late father Kazuo, and his own desires to be as strong as his dad was.

With his title on the line, Ippo goes toe-to-toe with Shimabukuro. The battle is so intense Ippo doesn’t even have room to breathe, to the point he starts turning blue! With Ippo struggling at the “bottom of the ocean,” has Shimabukuro met his goal of destroying the Dempsey Roll?!

Ippo emerges victorious after a vicious war with Shimabukuro, and Itagaki’s sister Nanako comes to pay him a visit at home while he rests. Meanwhile, Aoki is busy preparing for his first ever title match against the lightweight champion Imae Katsutaka.

After an infuriating face-off with Imae, Aoki turns to his girlfriend Tomiko for comfort. Meanwhile, Imae chooses to focus all his energy on boxing and his upcoming title defense, rebuffing his former girlfriend Sachiko’s attempts to rekindle their romance. Will Tomiko’s support carry Aoki to victory, or will Imae’s intense focus keep the belt on his waist?

Imae’s long hours of research quickly pay off as he decimates Aoki by countering every one of his trademark attacks, even the Frog Punch! As Tomiko watches on and the crowd awaits the inevitable knockout, Aoki does something that leaves the whole arena in shock.

Imae, cowed by Aoki’s fearsome new move, suddenly realizes what it is Aoki has that he lacks. Summoning up all the energy he has left, he faces his challenger once again. As the fight drags on, will Imae retain his championship, or will Aoki finally reach the belt?

Sendou Takeshi, the "Naniwa Tiger," returns to the ring! But it's his sparring partner, Sawamura Ryuuhei, who knocks Ippo for a loop when he calls the Dempsey Roll a "clumsy technique" and declares he's gunning for the Featherweight Title!

Ippo's next title defense is confirmed to be against Sawamura Ryuuhei, and after realizing the Dempsey Roll is vulnerable to counter punches, Ippo realizes he doesn't stand a chance. His only option is to somehow evolve the Dempsey Roll into a more effective move, but as he mulls over exactly how to do it, a surprisingly familiar face appears in front of him.

Volg has return to Japan to take back his boxing gloves from Ippo. He hopes to travel to America, but with no contacts there he must rely on Coach Kamogawa to introduce him to someone. The gang at the gym asks Volg to spar with Ippo to help him prepare for the Sawamura fight, but after such a long time away from the ring, can the Russian get in fighting shape in time?

As the fight with Sawamura draws near, Ippo has pinned all his hopes on the newly-evolved Dempsey Roll, to the point where practicing it has left him worn out and overtrained. Left with a dire warning from his massage therapist about the toll his new move is taking, will Ippo be able to perfect his technique in time for the fight?!