After placing second in Japan's national tournament, Valt Aoi receives a scout from the prestigious Spanish club BC Sol and decides to go to Spain. Thus begins the days of Valt Aoi and his friends challenging the World League on a global stage. However, to earn the right to participate in the World League, they must win their way through the European League. Can Valt lead BC Sol to the World League? And can he defeat the world's top players? The story of Valt Aoi's fierce battles and growth as he aims for the world's summit has begun.