It has been 8 days since the return of Princess Luna, and yet things aren't getting better, in fact they're getting much, much worse. Luna has barricaded herself in her room, and hasn't come out since her arrival at Canterlot. Fearing the worse, Celestia has ordered a full physical and psychiatric examination of Luna. But when the results force her to discuss the event of the past thousand years, it becomes unclear as to whether either of the two can take it, either due to guilt…or rage.

The first installment of the Luna trilogy.

Inspired from Mourning Zephyr's 'A Sun Without a Moon'
Special thanks to TheOnlyGaz for all his help