A sports instructor in Nagano is named Kenji Kiyosawa (Masataka Kubota). He is fascinated by a model house called Mahou no Ie, which is able to warm the inside of an entire home with only one air conditioner unit. Kenji Kiyosawa decides to construct a similar home for his wife and daughter, who are both sensitive to cold temperatures. In the meantime, Kenji Kiyosawa and his wife have a second daughter. Finally, the construction of their new home is completed. Kenji Kiyosawa, his wife, and their two daughters move into their new home. They are elated with their new home, but bizarre incidents soon take place there.

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