The May 2011 issue of Megami Magazine (volume 132) has one of the nicest covers (I think) in a long time. If you don’t recognize this pink-haired girl with doggy ears, she’s Princess Millhoire F. Biscotti from the anime Dog Days. I think she’s absolutely adorable (and it helps that Yui Horie is her voice actress) so I think whoever chose the cover for volume 132 did a good job.
There are quite a number of posters covering the spring season this time as well as some from the previous season. You can see them all below. As usual, any ecchi material is not previewed on this page, you will need to click on the links to see them.