Hikaru has always believed herself to be just a normal high school girl...well, as normal as a teenager with a genius mad scientist for a father. She spends her time with her best friend, daydreaming about the boy she loves and watching her favorite superhero show. One day, the past that she has known nothing about comes back to haunt her. She is shocked to learn that she is the last surviving member of the royal line from a faraway planet. Even more, she finds out that she has been protecting the ultimate armor and that it can decide the fate of the entire galaxy.