"Usakame" is a short-form anime series that serves as a spin-off of the popular sports anime "Teekyū." The narrative revolves around four high school girls who form an unofficial kendo club at their school. Despite their lack of formal recognition, the girls are passionate about kendo, though their approach to the sport is far from traditional. The series focuses on their daily lives, blending humor, absurdity, and lighthearted interactions rather than delving deeply into the technical aspects of kendo.

The main characters include Usami, the self-proclaimed leader of the group, who is energetic and often comes up with bizarre ideas. Tsubame is the most serious and skilled kendo practitioner among them, though she frequently finds herself exasperated by the antics of her teammates. Suzume is the youngest and most innocent member, often serving as the voice of reason despite her naivety. Finally, Tsukimi is the most laid-back and carefree, often contributing to the group's chaotic dynamic with her nonchalant attitude.

The plot is episodic, with each short episode presenting a self-contained scenario that highlights the quirky personalities of the characters and their unconventional approach to kendo. The series does not follow a continuous storyline but instead offers a series of comedic vignettes that explore the girls' interactions with each other, their schoolmates, and their occasional attempts to engage in kendo-related activities. The humor is often surreal and exaggerated, with rapid-fire dialogue and absurd situations that defy logic.

While kendo serves as the thematic backdrop, the series is less about the sport itself and more about the camaraderie and eccentricities of the main characters. The lack of a formal club structure allows the girls to approach kendo in their own unique way, often leading to humorous misunderstandings and unconventional training methods. The series maintains a light-hearted tone throughout, with no overarching conflict or dramatic tension, making it a straightforward and accessible comedy.