Magister Negi Magi - Mahō Sensei Negima!!

Honto No Mahou (Real Magic) (1x25)

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Asuna faces Chao before crystallized Negi becomes shattered into pieces. Asuna defeats Chao and Chao's Cassiopeia clock. After everything comes to normal, Negi and the rest of class 3-A say "Thank you" for Chao.