Kyoutoma

The story revolves around Shouta, a regular high school boy whose life is suddenly changed when a creature called a Gasshapon appears in front of him, and claims to come from the future. (The Gasshapon is shaped like Bandai's Gashapon prize-dispensing machines.) The Gasshapon was sent to the past by the future Shouta, from an era in which an alien group called CC (or Cold…

Minori is an illness-stricken, constantly bullied orphan girl. After one rainy day, she doesn't turn up at school, having been admitted into a hospital in a distant town. Two months pass, and the girl's two school friends, Takashi and Kyouko, receive a mysterious email with no sender listed. The email reveals a summer festival taking place at a nearby town... Source: ANN

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