During summer break, Teru takes the family to the beach. While Marika and Arisa are excited, Miya feels uneasy because of painful memories from the past. Teru’s words help her relax, and she begins to enjoy the sea. There, they run into Riru and student council members Homare and Takiko. The group heads to the Kounokura beach house, where Marika and Arisa soon start bickering again.
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