My Rolling Fortress in a Dying World

Vera Thorne has gotten reborn to the timeframe before the dinosaur apocalypse descends upon the world, which is on the day of her convocation. In her previous life, she was framed by Mia Ruth, the campus belle, which ended with her becoming dinosaur food. This time, Vera secures the deed over Raptor Cave and takes out a 400-million-dollar loan to reconstruct it into an apocalyptic fortress that's impervious to even nuclear missiles.Once her system is activated, Vera starts taming dinosaurs like pterosaurs, T-rexes and brontosauruses in order to form her own dino army.Mia, who has gotten reborn as well, allies with violent criminals multiple times just to attack Vera's fortress.She even goes as far as to pledge herself to Cyan Corp and commands mech-dinos so that she can rob Vera of her home.Vera manages to conquer the apex of predators and makes a counterattack with her massive dino army. With her own hands, she finally ends her mortal enemy's life. For the next seven years, Vera travels all over the globe and uses the taming bands to send all the dinosaurs to their original era.Now that the apocalypse has ended, mankind begins rebuilding their society.Just as Vera thinks she's finally welcoming tranquility back to her life, the temperature outside drops to a staggering -70 degrees Fahrenheit.It turns out that… the Glacial Age has just made its presence known…