The goal: 1 trillion yen!!!! In order to cover the 10-billion yen debt that Sora Kamiiri's father owed, Sora's birthplace, Kamiiri Island, was taken away from her and she was forced to find another place to live. Sora works part-time to try to buy back Kamiiri Island, which is filled with precious family memories, until she meets a mysterious boy named Fugetsu Akiyama. Along with Sora's childhood friend Soukaiji, they come up with a plan to steal a large sum of money!