It is the role of a Goddess to be a bastion of constancy. To see the world around her move forward, but to hide her own emotions always. So is the shell a Goddess must build up over the many ages of her life.
Celestia asks Twilight to move back to Canterlot for a year. With all her friends being very busy, they'll barely have any time to see each other any more. Well, all of them except one. A story about dealing with distance.
For Sunny Scribe, ever since that fateful day when Octavia moved into town, his life has been about her. However, as we all learn throughout our lives, time and distance change everything.