Here's my draft: A boy hides on an island to disappear into someone else's life. He finds a girl who is literally from another time. That's not metaphor, she whispers 1974 like it's her only anchor, and he's the only person who doesn't leave. The mystery isn't where she comes from. The mystery is whether you can love someone who was never supposed to exist in your present tense. A romance that starts with one person real and one person impossible. Revision: A boy transfers to a remote island specifically to disappear, to become someone nobody knows. Instead he finds a girl pulled from 1974, conscious but untethered, speaking only her name and a year that doesn't belong to him. The inlet where she emerges isn't a puzzle to solve. It's the thing that makes loving her impossible and the only thing that matters. This movie asks what happens when the person you're closest to was never meant to exist in your timeline. Romance and mystery aren't separate here, they're the same wound.
Kazuki arrives at a coastal high school seeking anonymity, desperate to escape his past and whoever knows his name. The island he's chosen is quiet, isolated, perfect for disappearing into himself. But the locals speak in hushed tones about an inlet where people vanish without explanation, where the water holds secrets no one wants to speak aloud. When curiosity pulls him toward the forbidden shore, Kazuki discovers an unconscious girl half-submerged in the tide. He brings her to safety, expecting answers. Instead, when she wakes, Nao offers only fragments: her age, her name, and one impossible detail repeated like a prayer. She whispers "1974" as though it means everything and nothing at once. Kazuki finds himself drawn into a mystery that refuses to fit into the present moment. Nao exists as a rupture in time itself, and their connection becomes the question at the center of everything. What happened in that inlet? Why does she speak of a year that predates her birth? And what will it cost him to uncover the truth that might be better left submerged?