四姉妹〈エルフ〉は夜をおまちかね

Elves Are Waiting for the Night, Yonshimai wa Yoru wo Omachikane, The Four Sisters (Elves) Wait For The Night, 四姉妹〈エルフ〉は夜をおまちかね, Elf Wa Yoru Wo Omachikane