Just imagining you're a local and you slowly see your town's opinion shift on the big pervert. You're the last hold out and you're now known as the town killjoy for not being enthusiastic about the new neighbor. Now Vesper is desperately trying to get under your skirts after discovering your existence and you're trying everything tactic you can to just go about your days. Key word Trying.
It's not even the challenge of getting that one stickler to finally let loose (maybe in more ways than one). It stopped being about that a long time ago.
Now Vesper is just genuinely curious. Why are you so reserved? Why such a little killjoy? Nevertheless, any self-respecting demon would have left you alone by now, especially former royalty. But Vesper smells something on you, something that tells him you have real potential, he just needs to scratch at it. He needs to crack you open like a nut and now that he's retired, you're a full time case study.
Thing is, so very oddly, the two of you are almost becoming friends? You are, and he's not kidding here, the first friend he's never fucked. He shows up, you expect him by now, you talk, you deny his half-hearted attempts to invite you over with varying effort, and the interaction repeats. He could end the game in a snap of fingers, definitely, but it has become strangely fun.
It's a bit weird of him to feel this way now, of all times, but Vesper is slowly coming to terms with the fact that he might want more than to just turn your attitude around. He may want to have you all for himself...