For five years since after Luna's return as princess of Equestria, Luna has been feeling guilty for everything she did as Nightmare Moon, even going so far as to torture herself in her own dreams for a creature called Tantabus that she herself created that it would be able to create nightmares that would remind her of what she did as Nightmare Moon and make her not to become the same mare again that tried to cause eternal night.

But thankfully that with the help of Mane 6, Luna was able to forgive herself during the lucid dream and even have a peaceful dream after all that she went through.

Twilight Sparkle, Luna's first friend and marefriend, decides to tell Luna how much she cares about the princess while she sleeps on the floor on top of pillows. But she's okay with that, since she knows that Luna doesn't feel or say anything in her sleep, right?