Maburaho, Rosario to Vampire Capu2 Recommendations
The core of both stories is pretty similar: a bunch of girls hitting on the same guy... lots of fanservice... Cool yet simple action scenes... a world of mythical magic. Though Rosario + Vampire has some more Gothic elements to it. I highly recommend watching it if you liked one or the other! ;)
Both series have an ecchi comedy base, with a pink-haired main heroine, a seductive secondary female, an eccentric lover from the side, and a smaller, magically in-tune girl all gunning for the same, basically normal guy. All the females seeking his affection are much more powerful than the protagonist, and generally have to protect him. Both stories also have a much deeper level of seriousness under the ecchi humor. I prefer Maburaho.