Zero no Tsukaima: Futatsuki no Kishi EP5 - The Spy's Seal

Louise's sisters move in and make Saito do the work. Siesta makes a pass at Saito when Louise shows up. Just when Louise was about to strike him with a newer whip an explosion happens. A thief stole something from the principal's office and the principal marked the woman with a magic seal on her chest. Saito tries to do it secretly but Louise finds him and tries to hurt him again. Then a commotion in her eldest sister room gets their attention. The thief is found out and when everything is done and over with because Saito didn't tell her what he was ordered to do along with other things that was justifiable she beats him with her new whip out of spite.