Shoujo Seikan Hyouryuuki

a spaceship in the shape of a horse-drawn carriage travels across the galaxy. riding in the carriage is ridley, the scientist who built this eccentric spaceship, and her partner watari, a shy girl. the two leave earth, which has become uninhabitable due to environmental pollution, and set off in the carriage. their goal is to find a safe planet to settle. however, all the planets they visit are very strange! a planet with a god who can bring all things back to life, another planet where the luckiest people are considered the greatest, and a planet with countless libraries the two girls are sometimes thrown for a loop by these strange worlds