Busou Shinki Moon Angel

Tsubasa is a young boy who dreams of becoming a Shinki master. Shinki are small robot girls which can talk, fight, and fly. On a full moon night, Tsubasa finds a damaged Shinki model and takes it home. After repairing it, he gives her the name of Kaguya. They live a happy life until the former owner of Kaguya finds her.