Saya, a World Space Association agent, receives an unexpected news one day that a significant number of asteroids are on a crash path with Earth, and it is her responsibility to stop them. Unfortunately, the only chance to preserve the Earth is for three persons with unusual abilities to exhibit a new skill on a crane game, which will generate an energy beam capable of diverting the asteroids. Three high school girls, Asuka, Mirai, and Kyouko, are the only ones with adequate promise. Saya tells them she has scouted them as idols and makes them work in an arcade where she can observe them in order to harness their energy. She tells the girls that all successful idols are women.