When Isoshita Junior High school upstart, Tetsuya Hikage, picks a fight with neighboring Hakuyou High School, he bites off more than he can chew when the Hakuyou American Football team join the fray. Losing his first ever fight, he vows to exact revenge on the rich kids of Hakuyou High by creating Isoshita's first ever American Football team and beating them. Within 24 hours, Hikage recruits an entire team as they resolve to spend their entire summer vacation training. However, when they realize they don't have a ball, or even understand the rules, it dawns on them that it's gonna be a long summer...

Hyuuma Hoshi is now adult and recovered from his injury. He wants to prove he still the best pitcher.

Makihiko Kasuga has transferred to a junior high school in a newly developed residential area in the Tokyo metropolitan region, and although his studies are the best in his class, he is very poor in athletics. On the other hand, his classmate Ryuhei Akagaki is an all-around sportsman, but he is not very good at studying. Kasuga was envious of Akagaki. When Kasuga hears that Akagaki's athletic prowess is the result of his karate training, he decides to join the same dojo as Akagaki. However, he is not a good athlete by nature, so his training does not go very well

An arrogant karate master named Tadashi Sawamura enters the kickboxing ring to prove his superiority, only to be beaten into a coma by a practictioner of the new art. AfSter recovering, his trainer Endo convinced Sawamura to study kickboxing in order to regain his honor. Source: ANN

In the near future, superhumans called Others, who have awakened to their unique abilities, are active in the world. The world enjoys peace and prosperity thanks to the overwhelming power of the Tiger's Nest, an organization of righteous Others who execute Criminal Others who use their abilities to commit crimes. However, poverty and crime were rampant in the old capital, the slums, which had been abandoned by the Nest. A lone tiger emerges from the darkness of the slums. The rebel hero, Tiger Mask, bares his fangs against Nest's justice. Now a new hero legend begins!

Based on the novel by Ikki Kajiwara, this manga, created by Tetsuya Dan, tells the story of captain Okita and his two sons who use a modified battleship Yamato to save Japan from the evil forces of Dr. Kira.