Yui Morisaki is the ace of the karate club, a perfectly ordinary girl with a slightly strong sense of justice. But she has a big secret… “Sacred light that drives away darkness—Holy Flash Princess, Pony Ceres! I have arrived at the scene of evil!” In a city targeted by the evil organization Zaidarg, Yui is chosen as the lone heroine who fights for justice: Pony Ceres. Today as well, she burns with a righteous heart and battles against evil! However, a powerful monster and a figure claiming to be one of Zaidarg’s commanders appear, pushing Pony Ceres into a desperate situation. Bound by spider silk, Pony Ceres is left helpless and humiliated in front of someone important to her, unable to fight back. What will happen to Pony Ceres!? Yui Morisaki faces the evil organization Zaidarg. Her body shines with dazzling light as she becomes clad in sacred armor.