A Summer Mystery!? Grandma's Treasure.Miyuki and her friends travel to the country to visit her grandmother Tae Hoshizora, who influenced her love of stories with tales of friendly creatures. Following dinner, with Tae knowing about Candy, Miyuki inquires why her grandmother doesn't just come to live in the city. Tae replies that she likes where she is as her 'secret treasure' is here. The next day, the girls encounter Wolfrun as he was escaping the summer heat in the mountains before losing his temper when Tae mistook him for a fox. But when Wolfrun sets up a Dark Zone, he and the girls are shocked to find Tae unaffected as she ignores the furious commander while returning to her house. Wolfrun responds by summoning an Incense Super Akanbe destroy Tae's house. With the apparent aid of the creatures from Tae's stories, the Precure defeat the Super Akanbe with Miyuki learning her grandmother's treasure.