"Hello, I'm Nakahara Taiyo. I went to Okinawa on a school trip and seized that chance to find more about my father, an underwater photographer. He disappeared at sea 10 years ago... I don't remember more, but that island, Zamami, seems familiar..."

That's a good and fast paced serie, no need to say more. You just have to read the first volume to get in the mood ;)

synopsis by Souhaku