A teenage boy meets himself ten years older and learns he has three months to save the life of someone he hasn't even met yet. The movie doesn't waste time on paradox mechanics, it uses time travel as an excuse to ask whether you'd actually change your own past if you could, knowing what it costs. By the end, you're not thinking about the plot. You're thinking about the person sitting next to you in the theater, and whether loving someone means protecting them or letting them become who they're meant to be.
Naomi Katagaki's ordinary Kyoto life shatters when someone claiming to be his future self appears with an urgent message: in three months, he'll fall for Ruri Ichigyou, a classmate who will die in a tragic accident ten years from now. The older Naomi has traveled back through time with a single goal: rewrite that devastating future before it becomes inevitable. Caught between disbelief and desperate hope, the younger Naomi must decide whether to trust this impossible visitor. But changing fate proves far more complicated than simply avoiding Ruri. Every choice spirals outward in unexpected ways, and the closer he gets to saving her, the more he questions whether his future self is telling the truth or pursuing something darker. The story becomes a meditation on love, sacrifice, and the weight of knowing what's coming. Naomi races against a countdown that feels simultaneously infinite and impossibly short, forced to confront whether some moments are too precious to lose and whether fighting against destiny only accelerates it toward you.