"Copihan" is a short anime series set in a futuristic version of Tokyo, where the city has been transformed into a high-tech metropolis. The story revolves around the lives of students attending Copihan Academy, a school that integrates advanced technology into its curriculum and daily operations. The narrative primarily focuses on two main characters: Kei, a cheerful and optimistic girl, and Nene, a more reserved and serious classmate. Together, they navigate the challenges of school life while exploring the unique features of their technologically advanced environment.

The series blends slice-of-life elements with light science fiction, showcasing the students' interactions with various gadgets and innovations that shape their daily routines. A recurring theme involves the use of a special device called the "Copihan," which serves as a multifunctional tool for communication, navigation, and problem-solving. The students often rely on this device to tackle both mundane tasks and unexpected challenges, highlighting the integration of technology into their lives.

Throughout the episodes, the characters encounter humorous and sometimes surreal situations, often stemming from the quirks of their high-tech world. The narrative maintains a lighthearted tone, with occasional moments of introspection about the role of technology in human relationships. While the series does not delve deeply into complex plotlines, it offers a glimpse into a futuristic society where innovation and tradition coexist, providing a unique backdrop for the characters' experiences. The interactions between Kei and Nene, along with their classmates, drive the story forward, emphasizing themes of friendship, adaptability, and the balance between progress and humanity.