Sakura is the granddaughter of a mysterious moon princess who slew demons with her Blood Cherry Blossom sword. All her life Sakura has been forbidden to look at the full moon without knowing why. Then one night, unhappy over her impending marriage, Sakura gazes up at the moon, only to see a demon attacking her...

Sakura, grieving for all her friends who have died, returns to Aoba's estate. Enju attacks, and Sakura loses two more people she loves. And just when she believes the battle to finally be over, Princess Kaguya appears!