Akane Motomiya and her friends Tenma and Shimon are pulled by a demon into another world, where Akane becomes the Priestess of the Dragon God. The people of this world tell her that she is the only one who can stop the demons from taking over; meanwhile, the demons want to use her power for their own ends. Luckily, Akane has the Hachiyou, eight men with powers of their own who are sworn to protect the Dragon Priestess. (Source: ANN)

High school science-whiz Makoto Mizuhara is working on his newest project in preparation for the school festival, alongside his best friend Nanami Jinnai. Nanami's brother and Makoto's lifelong rival, the unscrupulous student council president Katsuhiko Jinnai, is under scrutiny for mishandling the school festival planning and is convinced that Makoto is plotting to steal his position. One night, as Makoto and Nanami are taking a break with their teacher Masamichi Fujisawa, Jinnai sneaks into the science lab and sabotages Makoto's device, which suddenly opens a portal that flings all four of them into another world! Upon arrival, Makoto is immediately attacked by a horde of giant bug monsters. While running from them, he comes across Fujisawa and a girl named Rune Venus. After Fujisawa fights off the monsters, a group of dignitaries arrives, looking for Rune, their princess. They inform Makoto and Fujisawa that they are in a world called El-Hazard and take them back to the palace of Roshtaria, their kingdom. Though her advisors are suspicious of the newcomers, Rune decrees that they are to be treated as guests and quickly befriends Makoto. Unaware that Nanami and Jinnai are in this world as well, Makoto gets to work trying to figure out a way back to Earth.

The heroine is a normal girl, until one day she is invited to another world and becomes the princess of the dream world, where people use dreams as the energy to live. One day, the dream world is being attacked by something called "yumekui" ("dream eater"), and many princes are being attacked by it. The heroine must wake them up to save the dream world, as the princes are unable to wake up due to having their dreams stolen. (Source: MAL News)

As a young boy from a noble family in Amawakuni, Arata has always expected to make life his own—until word of the princess growing weak reaches his city. Unbeknown to him, his grandmother had claimed him to be female at birth, and now, with no other girls to succeed the princess from the matriarchal Hime clan, he is next in line for the throne! Disguised as a woman awaiting a replacement to be found, Arata witnesses an assassination attempt on the princess by none other than her own guard, the 12 Shinsho. The crime is pinned on his head, forcing Arata to escape to the Kando forest, where it is said that no one comes out the same. Meanwhile, in modern-day Japan, Arata Hinohara longs for escape from the cruelty of his classmates. Hearing his name called from an alley, he wanders from his path and unwittingly switches universes with Arata from Amawakuni. With his own power as a newly awakened "Sho"—a warrior able to wield Hayagami, weapons with the power of the gods—and the help of his companions he meets along his journey, Hinohara sets out to restore order to this new world.