Three high school girls have mastered the art of cooking simple, B-class dishes called JK meshi. The three girls — Reina, Ryouka, and Ruriko — are all classmates in their second year of high school. They often get distracted when studying for tests, and when they do, they cook JK meshi. (Source: ANN)

One day, Saya, an agent of the World Space Association, receives a sudden message that says a large number of asteroids are on a collision course with Earth, and it is her mission to stop them. Unfortunately, the only way to save the Earth is by having three people with extraordinary potential demonstrate a new skill on a crane game, which will create a beam of energy able to divert the asteroids. The only three people with enough potential are three high school girls—Asuka, Mirai, and Kyouko. In order to harness their energy, Saya tells them that she has scouted them as idols and has them work at an arcade where she can monitor them. She says to the girls that all successful idols are good at crane games, and that building their skills is their first step in idol training. As the girls learn new crane game techniques, they begin to doubt Saya's intentions but are nonetheless unaware that the fate of the Earth lies in their hands.

After utilizing the power of crane games to protect Earth from certain destruction by asteroids, the Crane Game Girls successfully become the planet's most popular idol group. However, their success is bittersweet when their manager, Saya, disappears on the day of their fateful final mission. One day, an Earth Invasion Idol group known as Dark Cherry interrupts a live show and challenges the Crane Game Girls to a battle. To make matters worse, Saya has reappeared as Dark Cherry's manager! As the group prepares to face off against their new foes, they begin to unravel the secrets of Saya's betrayal and the reasons behind the sudden invasion from planet Dark Gorilla.

Onyankopon watched over people long ago, but one day an old woman accidentally hit Onyankopon in the head with a mallet while mashing yams. Since then, Onyankopon has been nervous about greeting people directly, and so sends subordinates to speak to them and solve their problems. He will use Afrobeat and dance to help Japanese high school girls with problems such as dieting, love, and cramming for exams. (Source: ANN)