Bazett's barrier was supposed to prevent surprise attacks from the dolls, however Illya finds a little girl, Erica, sneaking into their school. For some reason Erica calls Illya "Onee-chan", and the two of them quickly hit it off. Meanwhile, a man claiming to be Erica's father appears. He seems kind at first glance, and while he came to pick up Erica, he's also...?!
Five years ago, the Ainsworths,
Es ist das Überbleibsel einer, 
von den Ainsworths …
Hace cinco años, los Ainsworth
Hace cinco años, los Ainsworth
Ce sont les restes
d’un certain désastre
Cinque anni fa, gli Ainsworth,
Cinco anos atrás, os Ainsworths,