1. The Story of One Summer Night and a Confession

After helping out at Kino's beach house during a lunch rush, Futaba decides to return there the next day while Hikari goes scuba diving with the others. While there, Hikari accidentally goes into an outdoor hot spring without her bikini top, putting her at risk of being exposed before the other girls come to save her. Later, after Hikari holds a barbecue party for everyone, Futaba worries about what she'd do if she has to part ways with Hikari, but Hikari encourages her to enjoy every moment they spend together.

2. The Story of Midsummer and the Sparkling Eyes

While Futaba is away for a memorial at her country home, Hikari befriends a girl by the sea who is fascinated by a mother octopus guarding her young - Futaba is determined to befriend her. Meanwhile, Futaba works hard as a volunteer helping to set up the local fireworks festival, working hard enough to earn front row seats in the VIP section of the festival for her friends.

3. The Story of the Pro and the Expert of Happiness

Futaba takes the underwater navigation tutorial but is brought crashing back to reality by the realization that she may be holding Hikari back - but is able to successfully complete it after she remembers all the lessons she had been taught by her friends. After watching the twins go on a night time dive, Futaba wrestles with the feeling that she may be holding Hikari back.

4. The Story of Autumn and a Tender Happiness

Futaba and Hikari spend an autumn day apart, and they both find autumn wonders of their own.

5. The Story of the Jet-Black Mermaid and the Solitude of 18m Under

Futaba goes diving in a drysuit, as the gang looks to encounter the legendary Jet-Black Mermaid.

7. The Story of the Neverending School Festival

The Yumegaoka High Dream Festival arrives, and the night before, the entire student body is busy preparing for opening day. This night would end up becoming a very special one for Ai in particular, as she has a very special encounter.

8. The Story of Fleeting, Unfulfilled Desires

After meeting Peter in an encounter straight out of fantasy, Ai now gets transported to a fantasy world, where she meets someone she never expected to meet.

9. The Story of Tears and an Endless Dream

Ai can't accept how Peter parted with Mato-chan and her, and so she decides to head back to Neverland, only this time she has company.

10. The Story of a New Beginning and New Feelings

Teko is invited to bring in the new year at Amanchu-ya, and she finds herself in the company of the whole gang plus a few extras. As they watch the first sunrise, a new kind of emotion takes over her and Pikari.

11. The Story of Cold, Flames, and Well Wishes

Pikari ends up with a cold on her birthday, so Teko decides to visit her at home. She finds someone on the way, which leads to plans for another fun event once Pikari recovers.

12. The Story of Future Possibilities

It's finally time for Teko's advanced certification test, with a promise of a night-diving celebration if she passes!