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Boukun Tyrano-san
Ralph is the king of all dinosaurs, but when suddenly a strange big thing crashes on earth, even he is powerless against it. He awakes 65000000 years later in the modern world in Mikobayashi Kana's body, only to find that the age of the dinosaurs has ended. Now the only thing he can think of is how to return to his time, but he is not the only "modern dinosaur"...