Sprite, Chikyuu no Houkago Recommendations
Spirite and Chikyuu no Houkago takes place in a fictional world where anything is possible. In fact, the world the main characters once knew changes to something beyond their imagination. Both series also contains a lot of mysteries regarding the many events from the past. There are also some subtle survival themes (more so in Spirte). Recommended for fans of post-apocalyptic world fiction.