While very much a demo, this is also very much a solid concept. Gameplay loops that naturally integrate the horny stuff into gameplay are hard to come by, and this process of investigate-discover-succumb very much accomplishes that. The interface is also quite good -- it's a charming Gameboy-style aesthetic that works very well.
From the way you've described it -- finding differences and piecing together clues -- it sounds like you've got very fun plans for this game. If you develop it further, please do let me know. It has the strong potential to be quite good :>
also props for squeezing this in 17 seconds before deadline
we respect that level of edging in this house