Girls' Last Tour, Vol. 5 (Girls' Last Tour, 5)

Even after a mysterious life form tells Chito and Yuri the end of the earth is near, still they continue their everyday adventures together, traveling slowly toward the city on the top-most layer. Their days pass as usual: with the goal of food and making it to tomorrow, with a little bit of relaxing and kicking-back, of course. Their search for water drives the girls into uncharted territory, but gathering supplies often leads to new discoveries about the people of old--and occasionally, stores of delicious food! Each stratum the girls climb offers a chance for adventure, even if it sometimes proves dangerous. When Chito is injured, it's Yuu's opportunity to try something new--driving the Kettenkrad! "The series follows two girls, Yuuri and Chito, as they navigate the ruins of civilization after an unknown apocalypse, and as they travel in their modified Kettenkrad [a type of military motorcycle on tractor wheels], they seek food and supplies while surviving day-to-day."--Wikipedia.com