Kujira no Kora wa Sajou ni Manabu!  

Kujira no Kora wa Sajou ni Utau Specials, クジラの子らは砂上に学ぶ!, Children of the Whales Specials

Two special episodes set in a school setting. Included with the Blu-ray/DVD volumes of Kujira no Kora wa Sajou ni Utau.