Sora no Grifters: Ichi Chouen no Sagishitachi

Synopsis

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 worked 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―!! (Source: Monthly Shonen Magazine, translated)