The series focuses on characters Akane Mizuno and Kotarou Azumi, two third-year middle school students who become classmates for the first time. The series will depict each characters' growth and connection to the people around them, such as classmates, club-mates, teachers, and parents. The anime will also center on the youthful adolescent romance of the characters, who are hounded by change and uncertainty as the seasons inevitably pass.