In addition to shaking his world-view, Keiki's encounters with the abnormal have led him to conclude that neither Sayuki nor Yuika are the elusive Cinderella. Through process of elimination, the only one remaining is Mao.
Until serving me as my slave becomes
the only joy you ever feel in life...
Solange, bis du
aus ganzem Herzen Vergnügen
Hasta que servirme como esclavo sea
la única alegría que sientas en tu vida.
Até que me servir como escravo seja
a única alegria da sua vida...