The quarterfinal round of the Winter Continuous Track Cup is in full swing, and each school is going all out. What started as a furious back-and-forth firefight between Ooarai Girls Academy and Chi-Ha-Tan Academy has become a 12-hour jungle slugfest with neither team having the advantage and almost everyone running on fumes. In spite of this, Miho Nishizumi and her teammates continue to fight into the morning, hoping to land a decisive blow before their rivals. Meanwhile, Kuromorimine Girls Academy—now led by Erika Itsumi—is struggling in its match against Pravda High School. Taking Maho Nishizumi's words of advice to heart, Erika manages to break free of Kuromorimine's rigid, traditional tactics and turn the tide in her favor. At the same time, St. Gloriana Girls College faces off against Anzio High School, while Saunders University High School has a tough fixture with underdog Continuation High School and its mysterious sharpshooter, Jouko. With only four semifinal spots up for grabs, the members of each team must give their absolute best performance if they want to survive and successfully make it to the next round!

Edo is a city that was home to the vigor and ambition of samurai across the country. However, following feudal Japan's surrender to powerful aliens known as the Amanto, those aspirations now seem unachievable. With the once-influential shogunate rebuilt as a puppet government, a new law is passed that promptly prohibits all swords in public. Enter Gintoki Sakata, an eccentric silver-haired man who always carries around a wooden sword and maintains his stature as a samurai despite the ban. As the founder of Yorozuya, a small business for odd jobs, Gintoki often embarks on endeavors to help other people—though usually in rather strange and unforeseen ways. Assisted by Shinpachi Shimura, a boy with glasses supposedly learning the way of the samurai; Kagura, a tomboyish girl with superhuman strength and an endless appetite; and Sadaharu, their giant pet dog who loves biting on people's heads, the Yorozuya encounter anything from alien royalty to scuffles with local gangs in the ever-changing world of Edo.

Rumor has it that Momo Kawashima, former student council member at Ooarai Girls Academy, is bound to repeat a year. Having failed her university entry exams, she is far from spending another year at Ooarai, but her plight is unenviable nevertheless. The only way for her to gain admission into a university is to be granted an athletic scholarship. With the Winter Continuous Track Cup rapidly approaching, Momo becomes the commander of Ooarai's tankery team, so as to demonstrate her sport skills and wipe away the stain on her honor. Their first opponent—French-themed BC Freedom High School—is split into two factions that are constantly at odds with each other. Despite this seemingly fortuitous match against a disorganized rival, Ooarai might soon find itself taking one step too far.

Senshadou is a traditional sport using World War II era tanks in elimination-based matches. Widely practiced by women and girls alike, it's advertised as a form of art geared towards making ladies more prominent in culture and appealing to men. Becoming a worldwide phenomenon over time, the influence of senshadou leads to the creation of a world championship which will soon be held in Japan. Miho Nishizumi, who comes from a lineage of well-respected senshadou specialists, is at odds with the sport after a traumatic event led to her retirement and eventually a rift to form between her and her family. To steer clear of the practice as much as possible, she transfers to Ooarai Girls Academy where the senshadou program has been abolished. However, with the news of the upcoming championships, the school revives their tankery program, and Miho is pushed into joining. Now, with the aid of some new friends, she must overcome her past and once again take command of a squadron of tanks in an effort to save her school from closure, all while proving to her family that the Nishizumi-style of senshadou is not solely about victory.