Kiyo's school is getting a usual physical checkup, and Kiyo finds out that he is doing much better than last checkup. His friends decide to place a bet, so whoever wins in the course of the physical checkup, gets the loser's portion of lunch. Elsewhere, a Mamdo named "Penny" is telling her partner Uri about her love, Zatch. At that moment, she finds Zatch who reveals he does not know who she is. Penny angered by Zatch forgetting about their "love" chases him down. Zatch still chased by a rampaging Penny, finds Kiyo. Kiyo realizing she is a Mamodo leads her to an empty area at the school to battle. Kiyo tries to tell Penny that Zatch lost his memories but fails to do so. Penny and Uri begin their battle with Zatch and Kiyo.
Una mamodo di nome Penny parla al suo compagno del suo amato Zatch, quando lo incontra, ma lui non si ricorda di lei. Penny, arrabbiata, comincia ad inseguirlo. Zatch incontra Kiyo, il quale prova a spiegarle che Zatch ha perso la memoria, ma lei non lo ascolta e li attacca.
La escuela de Kiyo está recibiendo un chequeo físico habitual, y Kiyo descubre que él está haciendo mucho mejor que la última revisión. Sus amigos deciden hacer una apuesta, así que el que gana en el curso del examen físico, se parte del perdedor del almuerzo.
体力測定の日。ガッシュを置いてさっさと登校した清麿は、今日だけやたらと豪華な給食のおかずを賭けて金山たちと勝負！ その頃、パティという魔物の女の子が、近くの川辺を歌いながら歩いていた。本の持ち主はウルル。実はパティ、かつて魔界でガッシュと出会い、魚を捕る姿に一目惚れした女の子だった。
