The girls in the Breakwater Club learn how to float properly just in case they ever fall into the ocean. Later on, Hina goes to battle with a heron, but then notices it has a fishing line tangled around its leg.
If you hold it to your chest
like an otter as she's doing,
إذا وضعتها على صدرك كالنمس  
،كما تفعل هي
Wenn ihr sie so haltet,
wie ein Otter das tut, treibt ihr besser.
Si la sostienen en su pecho,
como ella está haciendo,
La tenir à la manière
d’une loutre aide à flotter.
Se você segurar no peito como uma lontra,
será mais fácil de flutuar.