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.

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.

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.

The evolved Dempsey Roll saved Ippo from the jaws of defeat. Bolstered by the cheering fans, he chases down Sawamura. But with Sawamura more willing than ever to risk an illegal move, will Ippo's last bit of energy be enough to defend the title?