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The Story of the Blue World
The Open Diver course begins, with Futaba and Hikari paired up as buddies. Futaba loses one of her fins on the way to the descent point, but it gets picked up by another diver, turning her fears of the unknown world beneath her into excitement. Guided by the bubbles of the other divers, Futaba reaches the bottom of the ocean floor, wowed by the scenery and sealife spread out before her. Clearing all the tasks before her, Futaba passes the course with flying colors and becomes a fully-fledged Open Diver. Afterwards, Futaba and Hikari thank each other for everything that's happened since they became friends.
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Other episodes for this season
![The Story of the Girl and the Ocean](https://image.tmdb.org/t/p/w300/9e4L0RQRtUnP5K9Oxx5yB6F0w7r.jpg)
![The Story of Doing Something Bad With Hikari](https://image.tmdb.org/t/p/w300/6496diuDtsoroDH5iNdDRVuX7CJ.jpg)
![The Story of the Secrets to Excitement and Happiness](https://image.tmdb.org/t/p/w300/b2qwjd8MqhS3qHGuj9TZ9eZpcl7.jpg)
![The Story of Excitement and the Despairing Heart](https://image.tmdb.org/t/p/w300/yWuRC1SvpfHEilGFUPhJE69J8un.jpg)
![The Story of the First Time at Sea With Friends](https://image.tmdb.org/t/p/w300/4llCawy7wIKa4gc9vwH9dLMpGWN.jpg)
![The Story of the False Wish](https://image.tmdb.org/t/p/w300/uHlYwpArnclI2e07bOj0oRp8c0p.jpg)
![The Story of the End of Rain / The Story of the Beginning of Summer](https://image.tmdb.org/t/p/w300/fmD8UCIBPh4s8bOrjhgso542Yj.jpg)
![The Story of the Feelings Yet Hidden / The Story of the Things Yet Unknown](https://image.tmdb.org/t/p/w300/dHbQMGuHpvV5IrqXc0tShRKdtDK.jpg)
![The Story of the Memories You Can't Erase](https://image.tmdb.org/t/p/w300/swiFVAfpUysd4WuHbA7tNhVdlK9.jpg)
![The Story of Losing Your Way in Today](https://image.tmdb.org/t/p/w300/xslCj3vUTYPaqwIGuEeHpB7QLLE.jpg)
![The Story of the Cat and the Kitten](https://image.tmdb.org/t/p/w300/bwVb85XHovdqSgALgONZMlYho7P.jpg)
![The Story of the Blue World](https://image.tmdb.org/t/p/w300/4t9fmae1KLxP1NeecdYk1LP2gic.jpg)
![[OVA] The Story of the Promised Summer and New Memories](https://image.tmdb.org/t/p/w300/9ajGt4aoV4kHcvw2rLLGAXQjhDD.jpg)