The Knight in the Area summary: Kakeru Aizawa manages a regular high school soccer team but lacks proficiency in the sport, unlike his brother Suguru who is a skilled player and even the ace of the Japanese national team. Despite their good relationship, Kakeru privately envies his brother's soccer expertise. Meanwhile, Suguru believes Kakeru possesses untapped potential and sets out to uncover it. But Kakeru's life takes a turn for the worse when an unexpected disaster occurs, pushing him to play soccer and reconnect with a childhood love interest. This forces Kakeru to finally confront the emotional injury that has been holding him back.