In 2018, a family moves into their new apartment at Kashiwanoha Smart City, excited about starting fresh in this cutting-edge residential development. They tour the gleaming tower that will become their home, admiring its state-of-the-art amenities and eco-friendly design. Everything feels perfect, like they're stepping into the future itself. Then the ground ruptures beneath the city. A colossal mechanical form rises from the earth where their apartment building once stood. The tower isn't a building anymore. It's a giant robot, and it's alive. As the family grapples with the impossible sight before them, questions spiral outward. Why would a smart city hide such technology? What purpose does this mechanical titan serve? Is this transformation an accident, or is Kashiwanoha itself something far stranger than anyone realized? This one-shot mecha story blends wonder and unease, turning a pleasant suburban move into the moment everything changed. It's science fiction that asks what happens when urban development reveals its true nature.