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...?!
Yeah, forget the thanks! 
Just call me "Onee-chan" again!
Genau, spar dir den Dank! Nenn mich
stattdessen noch mal „Onee-chan“!
Sí, olvida las gracias.
Solo llámame hermana.
Sí, olvida las gracias.
Solo llámame hermana.
Appelle-moi encore mademoiselle,
à la place !
Proprio così. Puoi lasciar stare i ringraziamenti
e chiamarmi di nuovo "sorellona"?
Sim, esqueça os agradecimentos! 
Só me chame de "Onee-chan" de novo!