Umi da yo! Satsuki-chan!

Satsuki is a young girl who loves the sea and spends her days playing by the shore. Her cheerful personality and innocent curiosity draw the attention of those around her, including an older boy who becomes fascinated by her carefree nature.

As their interactions grow more frequent, the line between innocent friendship and something more begins to blur. The story explores the budding relationship between Satsuki and the boy, set against the backdrop of sunny beaches and summer days.