Hino Tommy

Only the three girls — Mirai, Ayaka, and Kyouko — can save Earth from being destroyed by a group of asteroids. They are hired by Sayo, the representative of a shadowy organization bent on turning them into an idol group. While the trio are more than prepared to be idols, they are instead taken into an arcade. Source: ANN

Earth is about to be destroyed by a meteor! The beautiful Sayo is told by the upper management at her mysterious organization that the only ones who can save the planet are three girls named Kyouko, Asuka, and Mirai. Although skeptical, Sayo brings them together by telling them they're going to train to be idols. They're raring to go, but for some reason, she leads them to an…