Pinkie Pie receives an invitation from a mystery pony.

Luna in trapped in her own mind, thanks to Nightmare Moon, but she can still have a diary. A little look into life on the moon. SPAAAAAAAACE. Translated into Modern Equestrian for your sake. Yes, You. The one and only, YOU.

Thanks to zaczac111 for helping me proofread! You helped a lot :)

MLP is owned by Hasbro.

Portal 2 is owned by Valve.

Picture by me.

(If I've got these wrong, please tell me!)