Takeru and Meo, two best friends both troubled by tragedies in their pasts, have been sweeping local junior karate tournaments as high school freshmen. But now, they set their sights on a national karate tournament. Unfortunately, the funding required to achieve their goal can only be secured if they form an official karate club at their school. Their first challenge lies in getting past the beautiful student council president Izumi Touko, who also happens to be the only daughter of the head of the biggest karate organization in the world, Koudan-kai (which is totally not Kyokushin). What plot will Touko hatch, and what price is she going to exact from them? As Takeru and Meo embark on their official karate journey which will lead them to confront their pasts, almost the entire cast of Karate Shoukoushi Kohinata Minoru makes an appearance, guiding them, and teaching them the true meaning of what it is to be a karate-ka.

Scientists discover a new material that renders people immune to all existing weapons. But these “peacemakers” instead transform world war into a martial-arts free-for-all! Rasputin plots with Russian President Putinov to control the global supply. Opposing them are the unstoppable Axe Bogan, a certain master in a jumpsuit from China, and a slew of other muscular heroes!

Alexander Purchinov is president for life of the country of Pursia, a country ruled by violence and the influence of its government. Alexander always desires to be dominant, and "ride" things, whether literally or figuratively. Now that he has already ridden his country, his next target is a fantasy world that has orcs, wyverns, and centaurs.

Kohinata Minoru is a college student at a college that is popular for its sports rather than academic orientation. He starts out as a gymnast alongside his friend, Nana, but is bullied by his gymnast seniors. One evening, a karate student at the college, Mutou Ryuuji, witnesses Minoru being bullied and comes to his rescue and drags him into the world of karate. Minoru makes new friends and learns some of their dark pasts, including a shocking death that reveals motives for revenge.