Kazuya Nakai as Shinichi Chiba, the captain of the rival Shinmaruko High School basketball club, who plays in the center position.
And Soma Saito as Tokitaka Tokiwa, the ace player of the Shinmaruko High School basketball club, who plays in the point guard position.
The story of Ahiru no Sora follows protagonist Sora Kurumatani, a high school student who loves basketball even though he is only 149 centimeters (about 4’11”) tall.