Both are sequel series that feature a plot-driven continuation of the original work, which is more character-driven.
both feature a teen/young adult who was previously timid and bullied, trying to live their lives normally after committing a life-altering act of violence that has hardened them into numb, unfeeling people with soft spots for those they care about
both lead characters are extremely weak at first, yet refuse to back down, either using their perseverance or intelligence to battle against stronger opponents despite their physical disadvantages
both feature the main characters getting caught up with a larger organisation, and personally attacked by the leaders of said organisation, whom they must battle with using hand-to-hand combat
both are tales of the underdog who only fight to protect the people and friends they love
both feature a teen/young adult who was previously timid and bullied, trying to live their lives normally after committing a life-altering act of violence that has hardened them into numb, unfeeling people with soft spots for those they care about
both lead characters are extremely weak at first, yet refuse to back down, either using their perseverance or intelligence to battle against stronger opponents despite their physical disadvantages
both feature the main characters getting caught up with a larger organisation, and personally attacked by the leaders of said organisation, whom they must battle with using hand-to-hand combat
both are tales of the underdog who only fight to protect the people and friends they love
The story of Geon U and U Jin, who previously took down a vicious gang of illegal loan sharks, and then now throw another refreshing straight hook against a global illegal boxing league that they get dragged into by Baek Jeong. He possesses overwhelming power, so much so that he can even defeat world boxing champions, and he does not hesitate to use any means necessary to drag the promising boxer, Geon U, into the dark league.
Suzuki Aoba, a gloomy high school freshman who has always lived an unattractive life, was enjoying his school life, even though he was occasionally beaten up by his classmate Iwase Sannosuke in what he called "play fighting".
One day, he is saved from the "play fighting" by Akasawa Kenshin, a superstar in the martial arts world who is attracting attention in the next class, but Kenshin suddenly says to him, "You're empty...", and Aoba cannot forgive him and declares that he wants to "punch him once". After being introduced by Sannosuke, Aoba enrolls in the Shark Gym, which is about to go bankrupt and is run by Tokiwa Kanenari, and enters the world of "MMA" (mixed martial arts)!
One day, he is saved from the "play fighting" by Akasawa Kenshin, a superstar in the martial arts world who is attracting attention in the next class, but Kenshin suddenly says to him, "You're empty...", and Aoba cannot forgive him and declares that he wants to "punch him once". After being introduced by Sannosuke, Aoba enrolls in the Shark Gym, which is about to go bankrupt and is run by Tokiwa Kanenari, and enters the world of "MMA" (mixed martial arts)!
