"Joshi Kausei" is a short-form anime series that revolves around the daily lives of three high school girls: Momoko, Shibumi, and Totoko. The narrative is episodic, focusing on mundane yet relatable moments of their school life, friendships, and interactions. The series lacks dialogue, relying instead on visual storytelling, expressive character animations, and sound effects to convey emotions and humor.

Momoko is the energetic and slightly airheaded member of the trio, often seen engaging in playful antics or daydreaming. Shibumi is the more reserved and thoughtful one, frequently observing her friends with a calm demeanor. Totoko, the most mischievous of the group, often instigates humorous situations and enjoys teasing her friends. The dynamic between the three is lighthearted, with their interactions highlighting the simplicity and charm of everyday life.

The plot is minimalistic, with each episode presenting a self-contained scenario, such as studying for exams, sharing snacks, or navigating the awkwardness of adolescence. The absence of dialogue emphasizes the universal nature of their experiences, making the series accessible to a wide audience. The humor is derived from exaggerated facial expressions, physical comedy, and the girls' reactions to ordinary situations.

"Joshi Kausei" captures the essence of youth and friendship through its slice-of-life approach, offering a nostalgic and heartwarming portrayal of high school life. The series is characterized by its brevity, with episodes running for only a few minutes, making it a quick and enjoyable watch. The lack of a central conflict or dramatic tension allows the focus to remain on the characters and their everyday adventures, creating a relaxed and endearing viewing experience.