The Chess Pieces have already tried to take over "Mar Heaven" once before, but they were foiled by a human visitor from Earth, who used the living iron ball known as "Babbo" as a weapon.

Now, Babbo has joined Ginta, but because he suffers from amnesia, he has no recollection of his previous glory. But with the Chess Pieces on the move again, Ginta and Babbo are expected to make history repeat itself!

The battle against the Chess Pieces commences when the gang is enlisted by an ugly dog to rescue a princess who's been frozen in ice. Ginta soon discovers, though, "Princess Snow" happens to look exactly like Koyuki, the girl from school he's long had a crush on... Can he be a hero in the face of this frozen beauty?

Story and art by Nobuyuki Anzai.