Based on the Sleeping Beauty tale, "The Apocalypse 13th" narrates the story of a cursed princess, who sleeps alone in a castle covered in thorns. She has fallen asleep by pricking her finger on the 13th spindle, a hundred years ago. But he doesn't have the heart, and at the end, the lovers jump from the tower's window, hand in hand, together. The song is featured on the albums If the World 2 and Mistletoe ~Kamigami no Yadorigi~. It was released on December 26, for the Kagamines' seventh anniversary and has reached the Hall of Fame.