After her coronation, Twilight receives a letter from Celestia telling her she has officially graduated. When she goes to confront her, she finds Celestia having tea with a younger unicorn student.
Celestia and Luna married the mane six, now they have a harem and a honeymoon to deal with. In all honesty, happily ever after isn't all it's cracked up to be. At least there'll be room for orgies.
While dealing with the emotional fallout, post Celestia's failed retirement, Twilight begs a favor for the future. This unveils the depth of their feelings.
Twilight Sparkle keeps writing letters to Celestia, but she never sends them. When Rainbow Dash swipes one of them, Twilight is desperate to get it back. Will she succeed, or will Celestia read one of her letters at last?
Celestia is feeling down and Luna recognises that what she needs is a bit of romance to bring a little sparkle into her life. Could this be the dawning of a closer relationship between Twilight and the Sun Princess?
After centuries of being alive, an eon of guiding ponies, Celestia must now face the day she long dreaded, but long knew would come. After all, there are few secrets she can keep from her precious student, and fewer still she wants to.