1. All alone. Slow shuffle on snow. Head is down. Nighttime. 2. With friends, but needing their support. Shown by holding hands. Head is still down. Slow walk on sand. Twilight. 3. More comrades. Hands are free. Basking in the sunlight. Head is up. Normal walk on sand. Sunrise. 4. Many more comrades. Jubilant and out front leading the way. Running on sand, beach in sight. Daytime.
Edit:
Just realized that it's Karina that's out front. Miho is the one in the middle with her arm up and her index finger raised.