Throughout the major cities of the world, girls are being killed by having their hearts ripped from their chests.

The population are all registered by number; the humans are descended from Dadan's domination plan.

Ryo has a nightmare in which he is attacked by a demonic creature. When he wakes up, he finds out that a murder took place during the night.

Ryo hears the Lord of the Demons' voice and runs from the house; the demon leaps into the wintry mountains.

Ryo has a nightmare in which he is attacked by a demonic creature. When he wakes up, he finds out that a murder took place during the night.

Dadan's true origins are revealed; being Ryo's only weakness, Dadan kidnaps Ryo's sister.

The fate of the universe is in Ryo's hands, as the final battle with Dadan has begun.

Following an ill-advised attack by the army, the latest Heterodyne has grown to cover central Tokyo, its many strands reaching down into the earth below- and in only a month, it will have become large enough to encompass the entire world!

A day with zero probability of a Heterodyne appearance gives the team the perfect opportunity to pursue other interests and tie up a few loose ends.

Faced with the prospect of having to turn Dai-Guard over to the army, Akagi becomes determined not to make a single mistake.

Twelve years ago, Japan was attacked by a Heterodyne, a mysterious monster that seemingly appeared out of nowhere. In response, 21st Century Security built a giant robot called Dai-Guard to combat the Heterodyne, but by the time it was ready, the Heter...

With Kokubogar needing serious repairs, Shirota resumes his previous assignment as Dai-Guard's tactical advisor… although not everyone is happy to see him after his earlier betrayal.

Dai-Guard finds itself in trouble when a balloon type Heterodyne shows up.

Nishijima may be gone, but 21st Century still has to clean up all the deals and contracts he made, including an agreement to send Dai-Guard to the Sapporo Snow Festival in Hokkaido.

The PR Division 2 workers may have been reassigned, but that isn't going to stop them from enjoying one last vacation together- until they discover that their rest stop is also home to a dormant Heterodyne!

It is the thirteenth anniversary of the day the Heterodyne first appeared- the day Ibuki's father died.