Keisuke Yaosaka

A boy living in Wakayama Prefecture accidentally comes into possession of an Adélie penguin egg and successfully hatches it. However, wanting to return the penguin to its natural habitat, he embarks on a journey to Antarctica. Along the way, in Central and South America, he faces hardships, such as being robbed by impoverished local children. The story is framed as the recollections of Ryota Ichikawa, now an adult, reflecting on his boyhood.

Twenty years after their planet was attacked by the brutal Zone Empire, the five Hoshikawa children, who escaped and were raised on Earth, must prepare for a brand-new war. This time, though, they're ready ... having developed the powerful Fiveman technology that will help them defend Earth from the same empire that conquered their home world.

Five high school students transform into Turborangers to defend the Earth from the Boma Hundred Tribes, who awoke from a 20,000 year-long sleep. They engage in battle using weapons developed by Doctor Dazai.