A boy, Tsuwabaki Daiya found a black fire in an ocean when he and his father were in a small boat. A big monster came out of the fire, and the father and the crews were disappeared into the sea. When he was about to become the next victim, a large mecka dragon appeared and saved him. 5 years later since then, Daiya becomes a junior high school student. A big monster reappear, and he meets the mecha dragon,Daiku Maryu. The head of the dragon separates from the body, and it turns into the body of a super robot, Gaiking. He gets in Gaiking, fights against the monster, and beats it. He learns that there is an enemy that plots to conquer the world, and he leaves for another world, Darius, to stop the plot. (Source: AnimeNfo)

Specials included with the Blu-ray/DVD release of Gabriel DropOut.

2nd season of Gakkatsu!.

Itou Keita, an average guy, is shocked when he's invited to attend the elite institution, Bell Liberty Academy. Unnerved by the mystery, he's further distracted by the school's social dynamics. In a sea of amazing young men, Keita struggles to find out what makes him unique, and how he can possibly deserve to be treated as an equal by the boys of BL. Lacking any particular ability, just why has Itou been welcomed into the privileged world of the talented and the beautiful? Along the way, he develops intense relationships with the almost everyone at school but he is terribly drawn to the friendly, over-caring but very mysterious classmate, Kazuki Endou.