Episode 0 of Robot Girls Z.

In the far future, the elevated irradiation from the sun has destroyed the environment of the earth and the birthrate of humans has drastically decreased. The government controls society with an army of cloned soldiers called "Ideal Children (IC)". Sam Coyne is a trader in a desert. One day, he saves a beautiful woman Maya, who has been chased by Theseus, a corps of IC. He shelters her in his trade ship, but the destroyers of Theseus surround Sam and Maya.

One night a Goblin father came home gave his son a red handball. But the boy was shocked to hear that his father picked it up in front of the house of a girl called Yuki The boy decided to return it to her. Next morning, he ran in the snow to a village and saw many boys and girls singing cheerfully. When he came to a small house, he saw a girl sitting alone on the veranda. She said, "I am Yuki. Who are you?" He handed a ball to her without an answer. She was very glad and said " I was looking for it. My sickly mother made this for me. Thank you very much." That gave him relief and they become friends.

The heroes of the series Mazinger Z and Devilman fighting against the evil Demon Clan.