The series focuses on the main heroine Chiari Tsukikage and her friends on managing the Jewelpet Cafe. One day at the magical world of Jewel Land, Lady Jewelina entrusted Ruby the Magical Jewel Box with a mission to make friends and collect Magic Jewels. At the same time she needs to attend the Jewel Academy to do so and open a shop called the Jewelpet Cafe. However with her friends, things didn't go well as planned with several failed mishaps happened to her and the students being scared, in the point of Ruby giving up. But when she met a young girl named Chiari Tsukikage and decides to help, Ruby's life is about to change forever. Now, she and her friends now must work together for the cafe to prosper, stick together through good and bad luck as well as protecting the Jewel Box from being stolen.

Twenty years prior to the story's beginning, an asteroid headed for Earth destroys Pluto. Due to Pluto's destruction, the asteroid, which is dubbed Thanatos, becomes temporarily stagnant. Now, in order to avoid Earth's impending destruction, the International Solarsystem Development Agency (ISDA) works on the "D-Project", and creates the "Dragonaut" after finding a dragon egg under the ocean. This weapon's primary purpose is to destroy the asteroid when the time comes. However, they soon find out that the asteroid is not their only threat, as powerful dragon-like creatures, which are bent on destruction, appear on Earth. After witnessing a murder by one of the creatures, Jin Kamishina, a lonely 18-year-old boy who lost his family in a shuttle accident two years ago, gets involved in the mysteries of the dragons and becomes the chosen pilot of the Dragonaut. Helping him on his journey is Toa, a mysterious girl who saves him from falling to his death after the creature attacks him. As they get deeper into the mysteries of the dragons, they encounter new friends and enemies, and also begin to develop a closer relationship. (Source: Wikipedia)

Fudo Jun is a beautiful supermodel who is idolized by many. She also has a dark secret that not even she knows about at first, for within her veins run the genes that hold the next step in the evolution of mankind. The same blood as the beastlike superhumans that terrorize the city. Unlike the rest of them, though, Jun has managed to hold a tenuous grip onto her humanity, and she is recruited by the mysterious Asuka Ran, member of a secret organization within the government, aimed at controlling, if not eliminating, these berserk destroyers of mankind. Jun, as Devilman Lady, must now exterminate her own kind, but how much longer can she keep her sanity in a situation she never chose in the first place? (Source: ANN)

Earth is still in danger: aliens from planet Zeraz are willing to invade our planet because theirs is being swallowed by a Black Hole. Led by Great Darius and his four generals, they begin seeding death and destruction. When an ESP warrior is killed by aliens, professor Hi-Tech understands the danger and builds the huge Space Dragon (Daiku Maryuu) piloted by Pete, and the gint robot Gaiking whose pilot is Sanshiro Shiwobuki, an ex-baseball player. Daiku Maryuu is a big dragon shaped spaceship and his head is the Gaiking torso. When the Gaiking enters the action, Daiku Maryuu launches other Gaiking's components and then it re-unite neck with tail, becoming unbreakable. The story chronicled the battle between the crew of the semi-transformable carrier Daikuu Maryuu and the Super Mecha Gaiking against an invading race of aliens from the planet Zela, whose home planet is facing destruction by a black hole. The robot Gaiking was piloted by a baseball star named Sanshiro Tsuwabuki (Sanshiro's name was changed to Aries Astonopolis for the English version of the show with the carrier being called the "Great Space Dragon", a literal translation of "Daikuu Maryuu". Gaiking was notable for being one of the few super robot series to take place in real places outside of Japan, and for being the first Super Robot series to have a mobile carrier for the chief robots. (Source: ANN)