Maken-Ki! Two Specials

Pros:
+Cute anime girls
+Just about every frame is fanservice
+Character development in Maken-Ki Two
+Xebec did it so the art is generally good
Cons:
-There are only five episodes

Just like the first season's specials, these know exactly why you're watching them. There's even some character development (a concept that was seriously lacking in the parent show's second season). As expected from Xebec (aside from some Pinocchio nipples in the third episode), the fanservice is generally well-executed. If you're still watching this show after seeing the second season, you're probably only in it for the boobs anyway so these are definitely worth a watch. Hard to find though.