This one doesn't really work, for much the same reason why "Beach incident" works so well: The characters are much sexier when they're in character. While I can easily imagine Haruhi using a promotional sex tape as a pretext for having sex with Kyon, she would never admit that that's what she was doing, even to herself, and certainly not to Kyon. Kyon raising no objections to their publically debasing themselves is also wildly out of character, and I'd expect him to question why none of the other SOS Brigade members are involved. The actual sexual play-by-play is good, but as a lemon it lacks excitement, since Kyon and Haruhi are so nonchalant about everything, except for Haruhi's exclamation at the end, which makes it feel like you cut the scene off just as it was about to get spicy. That said, Kyon/Haruhi lemon is surprisingly hard to find, so for that alone I'm thankful.
