On a sun-drenched island where summer seems eternal, a young man arrives to help pack up his late grandmother’s seaside home, only to find himself entangled in the lives of four enigmatic girls, each haunted by their own fading memories and secret wishes. This heartwarming and bittersweet anime series follows his journey as he uncovers the island’s magical secrets, including a mysterious mirror that can grant glimpses of forgotten pasts. The story weaves together themes of nostalgia, loss, and the fleeting beauty of youth, with each character—from the energetic girl chasing a runaway boat to the quiet artist painting the ocean—offering a unique perspective on letting go. As summer days slip by like grains of sand, the protagonist must help his new friends confront their deepest regrets before the season ends, all while confronting his own unresolved feelings about family and home. With its lush coastal visuals and gentle pacing, this is a poignant slice-of-life tale about the power of memories and the courage it takes to move forward.