Mecha Gishi Resta no Daibouken

Mechanics are craftsmen who develop and repair machines. One day, an incident occurred in the town where Rista, a "mechanic", lives, where robots went out of control. The out-of-control robots were hijacked by someone and turned into HENTAI robots that attacked the women of the town!

A criminal known as Frezero has taken control of the radio waves and unleashed hentai robots across the city, driven by an apparent vendetta against Resta, though Resta does not recognize her. Despite this, Resta ventures to the transmission tower to stop her. Along the way, she faces various sexual and humiliating challenges imposed by Frezero’s robots. A drug causes her breasts to grow uncontrollably, and while being violated, she is also milked like a cow. However, Resta manages to activate a secret ability in her vagina that allows her to continue her fight.