Nobita finds a fossilized dinosaur egg by accident, and with the help of Doraemon's tools, they hatched the egg and began raising the dinosaur. Knowing that they can't keep the dinosaur forever, Nobita was forced to send it back to prehistoric times where a group of hunters from the future threatens to endanger the dinosaurs. Determined to save the dinosaurs from the claws of the hunters, Doraemon and the gang returns to the past and sets out in a prehistoric adventure. (Source: ANN)

Conan was the only child born on Remnant Island, a place settled by a group of refugees while they fled a terrifying wave of magnetic bombs that wiped out most of humanity. After 20 years, most of the castaways have died, save for Conan and the wise old man that raised him. Believing Remnant Island to be the last inhabited place on Earth, Conan is shocked when he discovers a young girl named Lana washed up on the beach one day. Though he is thrilled to learn that humanity has survived, Lana tells him the nation of Industria wants her as a hostage to force her grandfather, Dr. Lao, to power their machinery. Their conversation is cut short when Industria's top pilot, Monsley, suddenly appears and seizes Lana. Determined to save her, Conan immediately sets off from Remnant Island and begins a journey that will ultimately determine the fate of the world.

Tobias, Mary, and Sakuya challenge the impregnable "The One Sin", but they lose their way in the maze and unintentionally trap other guild members. A mysterious cat is watching their blunder. Is it another player character or NPC?

Tsutomu, an average middle school kid busy studying for the final exams to enter high school runs into a man running from someone and gets caught up in the chase. In all the confusion he gets accidentally killed. Luckily Birdy (an interplanetary agent) knows a way to save him, unfortunately that means joining bodies to become one. So now he is stuck with this officer and along for the ride capturing criminals and saving lives.