A heart-stirring, time-hopping romance that'll have you reaching for a box of tissues and a plane ticket, this Japan-Taiwan co-production takes us on a soul-searching journey from the sun-dappled streets of Tainan to the serene snow-capped landscapes of Nagano and Niigata, as the lovelorn protagonist (Taiwan megastar Hsu Kuang-han, of Marry My Dead Body fame, a massive NYAFF 2023 hit) chases the ghost of his youthful passion: a Japanese backpacker lost to a caprice of fate. It's a quest prompted by a single postcard, a relic from a more innocent era (think late '90s, early 2000s), when handwritten messages held more power than a thousand tweets. The film wears its influences proudly, nodding to Shunji Iwai's Love Letter and Taiwanese gem Blue Gate Crossing, while May Day and Mr. Children's nostalgic tunes underscore the bittersweet ache of a first love’s afterglow. Ultimately, it stands as a poignant reminder that the past is never truly past, and that the greatest voyages begin with a single, haunting "what if?"