Two young girls, Youko and Airi, travel through an empty post-apocalyptic world. They photograph the scenery of famous places all to themselves and camp out in towns full of nature. The two of them ride and travel on a Serow off-road motorbike together, experiencing a never-before-felt freedom in travel with no traffic and no traffic lights. With the Serow bike, they embark on a journey around a now-destroyed Japan; a unique story about touring on a bike comes to life as an anime series! The world's over now, so let’s hop on a bike and go on a journey!