8 years ago, Western Civilization visited 19th century Japan. Mechanized dolls and new steam-powered creations began spreading throughout the country. The Wind Gang is a group of doll and steam users who believe in using their creations to violently bring about a new Industrial Era. They attack and destroy the peaceful village of a young doll user named Hiwou one day. Hiwou and his friends escape with a giant doll named Homura. Hiwou now wants to find his father, so that he can help defeat the Wind Gang, and bring peace back to Japan.

The pilot for GR: Giant Robo. However, there were significant changes between the pilot and the actual show, including a different writer and a different director. Thus, the special is less a promo for the series than an alternate version of how the series might have looked.

A college student, Sendō Kazuki, happened to set foot in the doujinshi community. There, people are producing and selling doujinshi, which is the comic book drawn by fans rather than professional writers. At first he was reluctant, but as he met the girls earnest about producing doujinshi, he was gradually involved in creating it himself. This series is based on a Dreamcast/PC game, "Comic Party", and its setting is different from the TV series. The main characters, Kazuki, Taishi, and Mizuki are college students whereas they were high school students in the TV series. The story starts after Kazuki has become acquainted with other characters.

In the year of 2013, the tide of zombies outbreak exploded in everyone's homeland, humanity launches a large-scale battle in the endless nights awaiting for the arrival of the dawn. The end is approaching, is there going to be a way out for them? Their faiths were shattered into pieces and buried in ashes in the raging fire. But within the blazing fire, a newborn hope arise once again.