In modern day Tokyo, three university students, Negishi Miyako (Neko-chan), Saiki Haruka, and Yamagishi Keiichiro, have magical powers that make them feel like outcasts. They come together one night and are transported to another world. They open a massive door and Neko finds that she is the Princess Neryulla, who must defeat the evil Duran III to free her people.

Renji grew up in a family that runs a pelagic fishing business and vaguely thinks about becoming a fisherman in the future. He is attracted to Kyoko, a new transfer student to his fisheries school who is knowledgeable about whales, but there is a big difference of opinion between Renji, who thinks whaling is wrong, and Kyoko, who advocates whale protection.

The Yamaoki family moved from Kyoto to Tosa around the turn of the '50s; local school teacher Hirao becomes involved with Yasuko, sister to Sumio.