Saber Marionette J Vol 3

From the Tokyopop edition

In an attempt to defeat Otaru and return to Faust, Tiger tries to follow Zoringen's plan to destroy Otaru with a kiss. She is unable to bring herself to kiss Otaru, and comes to the realization that she belongs to Faust and Faust alone. This realization doesn't do her much good, as she, Panta, and Luchs are struck by a plasma attack during an attack on Otaru and company. Otaru is kind enough to revive them, but their memory circuits are fried and they get the Saber Doll equivalent of amnesia. In the meantime, supplies from Gartlant are late and Zoringen is reduced to thievery in order to survive.

Source: Anime News Network Encyclopedia