Based on the manga by U-Jin. This is a story of two siblings, Anzu and Naruto Nozaki, heirs to the fabulous Nozaki fortune. Naruto appears to be an overbearing sis-con. In fact, he's madly in love with Anzu, because they're not blood-related. He confines her to the family mansion for "security," depriving her of companionship and a real life. At age 16, she starts to rebel. She smuggles in a kitten as a pet (Naruto hates cats) and then escapes in a delivery truck. Naruto catches up to her and realizes that she can't be confined like a bird in a cage. He agrees to let have a normal life, but just then, tragedy strikes

After scaling Mt. Everest, mountain climbing partners Saruwatari Gorou and "Lostman" Jack F. Woodbridge see the ISA Space Station, and each vows to make the trek into outerspace. When Helium 3, a new energy source, is discovered on the moon, NASA forms a new project named "Nexus" to harness that energy for use on earth. This is the story of the two and the paths they take to see their dream become a reality in the quest to harness the next-generation energy source. (Source: ANN)

Saiga is a normal high school student with a gift in mathematics. His daily routine is disrupted when his family gets news that his Father's remains have been discovered—a noted archeologist and researcher who had gone missing while exploring a site many years before. Among his remains were notes and artifacts that needed to be identified by the family near a notable triangular mountain in Japan known as "Japan's pyramid", a place suspected by some to be man-made. A meteor containing a strange robotic lifeform falls from the sky and begins to cause destruction, putting Saiga in danger and causing a mysterious bracelet from his father's research to activate and merge him with an ancient robot burried within the pyramid—a robot the runes describe as Reideen. It is now up to Saiga and guardian Reideen to fight against this unknown alien threat from the sky. (Source: ANN)

The follows a pair of twin brothers who, because of a feud between two formidable martial artists, were separated at birth and raised on opposing sides.