Umi's morning ritual with those signal flags is the entire film distilled into one gesture, patient, hopeful, unanswerable. The romance doesn't arrive as revelation. It arrives as the slow recognition that you've been watching two people become necessary to each other while they're busy trying to save something else. Studio Ghibli's hand-drawn 1963 Yokohama feels lived-in because it's allowed to breathe without spectacle, which makes the moment when Umi and Shun finally understand what they mean to each other land with the weight of something real, not constructed.

Umi lives in a boarding house overlooking Yokohama's harbor in 1963, where she performs a quiet daily ritual: raising signal flags toward the sea. When a poem about those flags appears in the school newspaper, she wonders if the author might be Shun, the charismatic editor who has begun to capture her attention. Their connection deepens as they work together to prevent the demolition of their school's beloved clubhouse, which is set to be replaced by a modern building ahead of the Olympic Games. What starts as a budding romance takes an unexpected turn when Umi and Shun, searching for clues to his origins, uncover a secret surrounding their past. Set in a Japan caught between tradition and modernization, the film is a gentle drama of first love, friendship and hope.