In an alternate universe, A-ko and B-ko are bounty-hunter partners who hunt giant tortoises on a sand planet. When C-ko is kidnapped by a gang of space pirates, A-ko and B-ko set off to rescue her — thinking only of the reward money offered by her wealthy father. Aided by a pint-sized Galactic Police Officer named Maruten, the girls discover that C-ko's abduction is part of a…