With help from Koharu and Noel, Nonoka starts to implement her plan to bring everyone back together and apologize for breaking her promise, by making a new promise to Yuzuki: that they’ll launch fireworks from the lake in a week’s time.
Yuzuki is dubious and quick to run away from Nonoka, Koharu, and Souta, an action that’s grown somewhat repetitive these last two episodes, to the point that if you took a shot every time she ran away in a huff, you’d be pretty boiled. But Nonoka and Koharu’s concerted efforts to make the fireworks happen ultimately manage to draw out what’s been eating Yuzuki all along.
Even Shione agrees to come in a week…if Nonoka can make the fireworks happen, which she doubts, meaning she thinks Nonoka is lying again, because she’s a liar. Shione has been feeling lied to an abandoned for so long, it’s formed a cold, hard, cynical crust. But we learn her and Yuzuki are not angry for the same reasons at all.
Yuzuki has really been angry at herself, ever since she ran away from home with fireworks and Souta rode off, desperately looking for her. In the process, he crashes his bike and badly hurts his leg, ending up in the hospital. Yet when their parents ask what he was doing, he protects Yuzuki and shoulders the blame himself.
Even before that, when the five friends were to meet at the pier for fireworks, nobody was able to make it. Yuzuki and Souta got separated at the festival, while Shione and Koharu stayed home. The only one who actually got to the pier was Nonoka, who was at the waterfront with her mom. When Yuzuki sees the dated photo proving she was there, she’s compelled to apologize to her too.
I for one am glad Yuzuki figured stuff out and there was finally a cathartic reunion. Even more significant, the four friends together (minus Shione, who’s still loitering around nearby, ever at a distance) actually get to see fireworks courtesy of Noel, who projects them off the saucer. This time, Nonoka was able to keep her promise. She’s made up with Yuzuki; but is that enough to move Shione?