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High schooler Chihaya spends summer on a remote island, where she meets Aya, a shy local girl who comes alive underwater. Aya leads Chihaya to her “secret base,” a sunken fishing boat deep beneath the waves. Their adventure marks the beginning of an unforgettable summer spent exploring a mysterious and sometimes dangerous underwater world together.
High schooler Chihaya spends summer on a remote island, where she meets Aya, a shy local girl who comes alive underwater. Aya leads Chihaya to her “secret base,” a sunken fishing boat deep beneath the waves. Their adventure marks the beginning of an unforgettable summer spent exploring a mysterious and sometimes dangerous underwater world together.






