Read Area no Kishi Manga:
Aizawa Kakeru is an energetic and dedicated eighth grader who serves as the manager for his school football team. Though he was well known for being a talented player the previous year, an accident during one of his games caused Kakeru to vow never to play competitively again. Still passionate about the sport, Kakeru dreams of one day becoming a professional football trainer so that he can work alongside more.. his older brother Suguru, the ace of the school team who has represented Japan in international competition.