When Saya, a member of the World Space Association, receives an urgent message about Earth facing an asteroid threat, she enlists the help of three high school girls with exceptional abilities—Asuka, Mirai, and Kyouko. To avert disaster, these girls must master a new skill in a crane game that will generate a crucial energy beam. Under the guise of idol training, Saya guides the girls in honing their crane game prowess at an arcade, all while concealing the true gravity of their mission. As doubts about Saya's true motives surface, the girls remain oblivious to the pivotal role they play in saving the world.