10,000 years ago, acting as judge, jury and executioner, Dangaizer sealed the fate of mankind by reducing it to ashes. Slowly, mankind rebuilt their civilization and once again stands at its peak. Hiding amongst the survivors of mankind, the evil organization of Goma lies in wait for the return of Dangaizer. This time, it’s a race to stop the awakening of the 3 that can pilot Dangaizer and subjugate the world to their rule. Will the 3rd pilot learn her true destiny and awaken in time, or will the world find a new destiny in the hands of Goma? (Source: AniDB)

Unaired episode 12 included with volume 4 of the BD/DVD release.

In 21st century Japan, cars with artificial intelligence for increased safety, known as A.I. cars, have revolutionized the car industry. Special schools teaching children driving A.I. cars have been established. One day, Kakeru Todoroki, a fifth grader of Arcadia Academy, was summoned by the school principal and given an A.I. car to save the humanity by chosen drivers like you. The car, however, is not just a car but also a transforming robot known as Gyrozetter. (Source: ANN)

When Mizuki Hijiri transferred to a new school, all she wanted was to live a normal school life, but that did not prove to be the case when she met the infamous Hero Club. All of its members are boys suffering from various types of chuunibyou—Yamato Noda is a righteous hero, using his athletic abilities to perform noble deeds and protect others; Kazuhiro Nakamura claims to be the reincarnation of Touga Ryushouin, the result of the forbidden union between a demon and an angel; Tomoki Takashima is a pretty-boy otaku whose one true love is the 2D anime girl Sora; and Rei Tsukumo plays the role of a schemer, covertly pulling the strings. Dragged along as the newest member of the Hero Club, tepid Hijiri can't obtain the normalcy that she desires. But even so, despite their various quirks, their bonds of friendship are real; Hijiri's life can only get more exciting when she joins in on their delusions of grandeur!