This is a good oneshot, and like all good oneshots it leaves me wanting more. But it's probably for the best that there isn't. He's just teaching her lewd stuff, and she's just curious. They don't love each other, they haven't exchanged ILYs while having sex, and at the end, instead of saying it, they both said "see you". The guy clearly has experience, so him having a girlfriend isn't far fetched. She's a virgin and inexperienced so she probably doesn't, but what if she does find one? What will he feel? What if she ends up catching feelings for him and he doesn't reciprocate it, as we see in the last chapter where she's the only one blushing, with him just smiling indifferently? what will she feel then? The future of their relationship will be full of thorns and hurdles from now on, never mind the fact that the relationship itself is taboo. These two have quite the ride ahead of them, and I'm both sad and thankful that we won't get to see it.