The otter dogs are searching for and recording "good sounds" on the beach. As they listen to the sound of the waves, they find a strange white, fluffy thing hiding in the shadow of a rock...?

While out for a walk, everything Shirotan sees looks delicious. With his stomach rumbling, what will he find in the end...?

"Come on, let's go," Shirotan suddenly starts walking. Rakkoinu and Sheru, who don't know the destination, follow along excitedly, but...?