Naoya Inaba (Yuto Nakajima) grew up abroad. From his childhood experience, he thought “yankees” were the strongest heroes (in Japan "yankee" refers to delinquent youths). He was also influenced by the Japanese yankee manga he read from abroad. Because of his own experiences and reading manga, he is full of chivalrous spirit. Naoya arrives in Japan to spend one year at a high school in Japan. He is transferred to a technical high school which is about to be closed down. Naoya admires the school because a yankee, who he admired as a child, went there, but he soon realizes that there are no real yankee like hero figures. There are only students who spends there days meaninglessly. Naoya is disappointed, but he happens to play water polo.