Magister Negi Magi - Mahō Sensei Negima!!

Saki Saku Tansaku (1x19)

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Fuka and Fumika venture into the woods to fetch water, as the supplies are beginning to run low. They enter a dimensional loop from which they cannot escape, and are saved from Kaede. Before vanishing, Kaede presents the twins with a letter, which they are told to deliver to Negi. Kaede has now disappeared without a trace in the Mahora forest.