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! As the town's mechanic, I'll solve this case! Rista fights bravely, but the HENTAI robot's tentacles make her experience an unknown pleasure. The slimy tentacles and bikinis play with Rista's innocent, plump body. Good luck, Rista! Don't give up even if you're treated badly, Rista! The robot developed by the mechanic is hijacked by the radio and transformed into an erotic HENTAI robot!? Even the eccentric Rista is fascinated by the HENTAI robot's fantastic sexual techniques and becomes wet and sloppy.