The gang is heading out to the fireworks festival. After a failed experiment (which was not Nagisa's fault), Shino decides that Saki and Naoya need to have their first kiss with the fireworks display helping to set the mood.
Naoya and the girls depart for Okinawa. The trip gets off to a bumpy starts when their plane encounters turbulence, and Naoya panics. Once they get to their vacation home in Okinawa, the girls put on their swimsuits.
Mirika has kidnapped Naoya and locked him in a room while Saki and the others try to find the key. Shino is taken aback by Mirika's resolve, and begins to question the way she's been hiding her own feelings.
Shino and Naoya are stranded on an uninhabited island, and Shino has ended up naked again. Has the time finally come for Shino to confess her feelings? Meanwhile, Saki and the others have realized that Naoya and Shino are missing.
Shino confesses what happened on the island to Rika, who is less than sympathetic. In fact, she predicts that Shino is simply going to be rejected, and texts Naoya to come over so she can see it play out for herself.
