"It's the usual way home from the club after school, but something was not right... Kenta tried to shake that feeling off his chest and hurried home. All of the sudden, the bright moonlight faded and Kenta looked up just to see a figure of a person floating in the air. The figure became bigger and bigger... then he realized that it was falling toward him! Not only that but it was a girl in torn up kimono! Kenta rescued the falling person in time and discovered that her face was covered with a Prajna mask. 'My name is Maimu...' 'You are the chosen person... the person that will fight along with me...' Then a man and a woman wearing a black kimono appeared and began attack them! Suddenly, the Prajna mask and Kenta's body glowed before the mask split. Then his body was absorbed into the 'Homura armor' that is being armed to Maimu who stood up and now radiated dazzling light. 'The evil doers are purged as Bird of Flame rises. The warrior of love and courage, Houou Senki☆Maimu has arrived!' Maimu is actually a princess warrior who came to prevent Heike army from conquering the Earth. The story about a protagonist and a heroine that came from a faraway world in order to stop the world invasion has begun."