Atlus seems set on drumming up interest in almost released Persona 4 by the most prurient of methods – a onsen peeping game involving spying on the young ladies of the protagonist’s group bathing.
Whilst none too steamy, it is a start. Play the game on the pre-release site (not really recommended, as it is rather tedious); better see yet a video of the action, such as it is, on NicoNico, before they delete it at the behest of rights holders somewhere. Alternatively, look below.
I rather suspect these CGs were done for the game proper, not this minigame, so perhaps there is more to look forward to?