"Toei Robot Girls" — a project of transforming "legendary super robots into beautiful girls!" The stars of "Robot Girls Z" are the Z-chan, Gre-chan, and Grenda-san. Together they protect (or try to) the city of Photon Power from the "mechanical monster-girls of the underground empire." At the head of the villains stands Baron Ashura, the underground emperor, inclined towards world domination or at least domination over the city.
Toei Animation 
LandQ Studios Japan