Sex happens somewhere people could walk in or outright watch, like streets, trains, classrooms, or parks, and the risk of getting caught is part of the turn-on. Scenes lean hard into exhibitionism and voyeur angles, with the girl getting fucked while trying (and failing) to stay quiet, plus plenty of blushing, ahegao, and messy cum shots despite the “don’t get seen” pretense. You often get reaction cut-ins from passersby or a hidden onlooker, along with typical mosaic censorship over the genitals.