The story begins in the ruins of the Golden Pyramid, where Princess Shokora, who once ruled the area, had been put into a cursed sleep by the selfish, money-crazed Golden Diva. Princess Shokora was transformed into a Black Cat, and banished from the Pyramid. The Black Cat soon came across a city inhabited by modern humans. There she lived on the streets with a group of stray animals. The Pyramid was later discovered by a group of archaeologists. Many undisclosed accidents hindered the findings of any treasure. Arewo Shitain-hakase, a robotic engineer, heard the rumors of the Golden Pyramid and set off on his own expedition. However, he is believed to have gone missing.