Anjuu Sendou is a nice girl who just started her first year in the Seiryuu Academy Middle School. She is currently living away from home as a boarding student with her pet named Lime. Her father is a sorcerer and her mother is an expert in Chinese kenpo. They are both famous, especially her mother who is called Dragon Momoka.Because of her motherâ€s fame, the executive committee wants Anjuu to join the student council. But the councilâ€s president thinks that she is a weak girl, so to prove him wrong she decides to catch the school thief. When things get difficult and she wishes to become stronger, her pet suddenly transforms into a small child with wings (a pre-dragon form, because Lime isn't fully grown) and tells her about her power.The next time the school thief appears, Anjuu, with the help of Lime, transforms into a new Saint Dragon Girl, defeating the enemies and becoming the schoolâ€s protector. Will the student councilâ€s members find out the true identity of the warrior girl? Will Anjuu be able to keep her secret?