Ep. 12: Magic Carat investiga un fantasma en el Valle de las Luciérnagas durante una visita de verano a Tokuji.

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The Magic Carat troupe makes a summer trip to Firefly Valley, to visit Grandma Nakamori's cousin, a photographer named Tokuji. However, that night, a group of construction workers who have been building a hotel come to ask Magic Carat for their help in ridding the valley of some ghosts, who have driven off most of the construction workers. The troupe takes up the challenge, but are scared off when the ghosts really do appear. As they are running away, Mai trips and hits her head, and when she comes to, she discovers that Uncle Tokuji is behind the "haunting". Out of anger, Mai promises the workers that Emi will uncover the truth, and sets out the next night (followed by a film crew). After getting past the fake ghosts, Emi asks Tokuji why he would do such a thing, but is stopped short when the fireflies begin to glow around them. The construction workers decide not to disrupt such a beautiful area, so Tokuji can rest well knowing that his late wife's memory persists in the place she loved. (Source: Wikipedia)