I'm not shocked by the shameless courting of base hormonal impulses, since Atlus did the same thing for the first game. I am, however, shocked by the second poster showing what appears to be, at a glance, an erect, flesh-colored phallus emerging from the water around Izuna's crotch.
A closer look reveals that it's just a knee belonging to Shino, the dark-haired girl sitting more daintily in the upper corner. Still, it's a shame that the first poster won the vote, as people who'd hang these on their walls deserve to get weird looks for reasons they never intended.