The manga has panty shots but I never thought they were so... aggressive. And not so numerous. The manga is a strange mix of humour similar to the anime (though no bats and such) and then the major plot, which is pretty dark. The manga also started with the "monster of the week" kind of stuff, though, so it's not like the anime would be that different in that sense. If there's going to be a second season of anime, I could see how they might opt to end this first season by making a cliffhanger with the really interesting stuff that they could start in the last eps. If not, this will be one bizarre series of nothing at all happening.