At a certain riverbed

"At a certain riverbed" is the graduation work of Kohei Nagasaka, a student at Tama Art University. The anime's premise likely revolves around the experiences of students within the art school environment. The narrative may explore themes of artistic expression, the pressures of academic life, and the anxieties associated with graduation and the future. The setting is likely within the university campus, potentially including locations like studios, classrooms, and perhaps even a riverbed, which could serve as a symbolic space. The story may focus on the characters' relationships, their creative processes, and their individual journeys as they prepare to leave the familiar world of academia.