This movie starts with Saze X playing basketball. Suddenly, a lightning bolt hit the earth. They walked towards it and found a boy. The boy's name is Ricky, and he thinks he has forgotten everything. On the other hand, Remy told Sazer-X that a giant monster named Mechanical Giant Bulgario had approached Earth and was destroying buildings. Sazer X still defeated the monster. But then something flashed into their eyes, and Takuto mistook it for a cosmic capsule. In fact, this is the Bosquito people that exist within Bulgaria, which Professor Horiguchi later explained.
该剧改编自同名漫画，讲述了老街上一个普通家庭的女儿佐佐木·西那瓦拉（Sasaki Shinawara）的故事，她嫁给了一个始于江户时代、持续了400年的上流社会家庭。然而，这并不是一个麻雀变凤凰的灰姑娘幻想故事，而是一场血腥的人类战争的开始。
