In the aftermath of a world consumed by calamity, six-year-old Kasumi Arai finds refuge in a resilient stationery shop amidst the chaos of perpetual winter. Her sanctuary becomes a haven where she immerses herself in sketching her beloved anime character, Miracle Momo, using an array of vibrant pens. As a young man revisits his family's abandoned store, he stumbles upon Kasumi's drawings, sparking a nostalgic connection between them as he reciprocates by sketching the same character. Thus begins an unexpected bond between two souls in a desolate world.