Imagine a world devastated by nuclear war, where the strong oppress the weak and strength is the one thing that will ensure survival. A world where even close friends can betray you for power, a lesson that Ken, the Fist of The North Star, learns when he is nearly killed by his closest friend and left for dead. He's not an easy man to get rid of, and he returns - very angry.
It is the year 300X, and the Earth is in peril! Tsuru Tsururiina, the evil dictator of the Margarita Empire has sent his elite troops to Earth to snatch every last hair on the heads of the unsuspecting populace! But there is one man who will stand up against the malicious invasion and save everyone from the terrible horror of baldness: Boboboubo Boubobo! Using his secret art of nose hair combat, Boubobo will not rest until the Margarita forces are gone from Earth for good. But can he succeed without the help of the pink-haired girl Beauty, or the mysterious Pickle that follows him around?
In the future, the world as we know it is inhabited by humans and Darkstalkers -- beings of the night who descended upon the planet and stole away the light of the sun. Discrimination is at an all time high, fueled by the tendencies of some Darkstalkers to prey upon the humans for their own desires. However, amongst the dark there are those who fight for good, such as the hybrid Donovan and two sisters who are out for revenge. With the coming of the ultimate demon Pyron, the humans and Darkstalkers must band together one last time to save the planet from his wrath...
Recca dreams of one day becoming an excellent ninja, but in this day and age ninjas are only talked about in history lessons. While playing his ninja games, he meets a mysterious woman that reveals to Recca his past, his bond with the powerful Hokage clan, and the special flame power that resides within him. Meanwhile, the evil Kurei has plans to gather the madougu from the Hokage clan so that he may take control over the elemental powers, but Recca is determined to master his flame and stop Kurei’s evil plans. Does he have what it takes to live up to his own expectations and put a stop to Kurei himself?
Both animes share a very similar animation and character design if you enjoyed the animation in one you will surely like the other. They are also both fighting shows invloving extremely buff men. Hokuto no Ken focuses more on martial arts with head exploding moves while Otokojuku focuses more on delinquents beating each other up and showing "guts".