6-okunen no Hakubutsu Tabi

Society has developed time machines, allowing people to travel back in time to the ancient past. Inochi and Akari, two university students majoring in paleontology, are traveling to various epochs. They witness dinosaurs, go camping in the Cretaceous period, and even eat ammonites. A dinosaur x girl story overflowing with ambience!

(Source: Houbunsha, translated)