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A young boy named Daichi is trying to photograph ghosts when he happens upon a mysterious house.

Because their house travels through time, Mai always has to leave friends behind. This has caused her to normally keep her distance from others, but then she meets Konami in high school.

Mii decides she wants to cosplay as a magical girl and go around helping people, which leads to her meeting a sickly girl named Miyuki.

Alone in the mansion's Christmas shop, Mea meets a mysterious girl who insists that Mea fixes her doll. Shortly thereafter, however, the girl vanishes, and soon so do the three sisters.

Appearing at the construction site of an amusement park, Ai encounters a dandelion that knows where to find Shizuku, the girl they've been searching for.

The mansion returns to the amusement park five years later where Mai has a reunion with her sisters.

It's been thirty years since Daichi encountered the three sisters, and after seeing their mansion in a photograph of his daughter he goes searching for them.

Appearing at a Shinto shrine, Mii meets Nono, a devout priestess in training. Nono loves Christmas but her grandfather dislikes all non-Shinto ways and beliefs.

Returning to the city where Mai met Konami forty years earlier, Mai mistakes her daughter, also called Mai, for Konami and tries to befriend her.

Mai is distraught after what happened with Konami and tries to destroy the portrait they drew together but Mea intervenes.

Keith leads the three sisters to Shizuku, finally ending their long search. Weary from the constant traveling and losing friends made along they way, they ask her to let them each return to Daichi, Konami, and Nono respectively.

Mai, the now grown-up daughter of Konami, is telling a curious Daisuke, the youngest child of Daichi, about the three time traveling sisters.