Yume Shinjo

With graduation 10 days away, homeroom teacher Hiiragi gathered all 29 students of class 3-A and proclaims them his hostages. His last lesson regards the death of a student that passed away a few months before. Nobody will be able to graduate until the truth is known.

Scientists believe that 65,000,000 years ago, a meteorite's crash on Earth killed off the dinosaurs, but in truth, it split Earth into two parallel universes: The Earth we know is referred to as "Another-Earth" by the residents of the Earth where dinosaurs were still the superior species, Dino Earth. Overtime, the humanoid Ryujin(dino people) and Bakuryuu(mecha dinos) races came into being on DinoEarth but were at war with the Evolians, enities that emerged from the meteor. The two Earths are separate until Asuka, a Ryujin from DinoEarth, arrives on Earth via a transdimensional portal. However, he is followed by the Evolians in their Anamolicarus spaceship and the three Bakuryuus under their control. As the Bakuryuus Tyrannosaurus, Ptreranodon, and Triceratops attack Tokyo, a call is sent out to people who possess DinoGuts and the potential of gaining the power to tame the rampaging Bakuryuu. Together with their Bakuryuu partners, the three people recognized by the first three Bakuryuu become Abarangers to protect their dimension from the Evolians.