Cyberpunk aesthetic, skimpy or skin-tight outfits, transparent or shiny latex, or complicated high-class designs, gaudy hairstyles and colours.
Body modifications are must. Tattoos and piercings, cheap and widespread cosmetic surgeries, various cyberware, could be used in some kinky ways, like huge cyberdicks or inflatable boobs. Cyborgs or even androids.
Mind control. Direct or some subtle manipulation, like memories rewriting or chips which boosts lust or prevents/force some behaviour, Tales of Drunken Cowboy had a plot where was the cyberware of the main heroine infected by a virus and tried to turn her into a bimbo slut, that was hot af. Or there could be some plot with AI who gains android body and you have to teach her physical love. Body-swap plots are cool too, like MC finds herself in a body of sexdoll or something.
Inequality. There are poor people, thugs and whores who would do anything to survive and then there is the powerful elite who is above the law and exploit others. They do not care about the lives they destroy because of some evil schemes and experiments or just for their sick amusement. And they are decadent and twisted. MC could be one of them, or work for them (crazy scientist/slave trainer/mercenary/troubleshooter), or against them, maybe s/he was a part of elite but was betrayed and now wants her/his revenge? Or those might be a backstory of some NPC.