If you liked the Akane-Iro ni Somaru Saka anime, the Anime-Planet community thinks you'd like:
Fifteen-year-old Tsukune Aono is average in every way; he has no hobbies, less-than-stellar grades and he's even flunked his high school entrance exam. His parents have managed to enroll him in a school, but it's no ordinary school! Tsukune will be attending the Youkai Academy, a place where monsters learn how to co-exist with humans! As the werewolves, vampires, witches and other monsters are required to retain their human forms, Tsukune - the lone human - is able to avoid their bloodthirsty gazes. However, he quickly attracts the attention of a number of devilish beauties including the vampire Moka, a busty succubus and even a young witch! It seems Tsukune's average life isn't so average anymore!
If you liked Akane-Iro ni Somaru Saka or Rosario to Vamprie, you'd like the other because they have both the main characters surrounded by beautiful women and the male protagonists both fall in love with the most unlikliest of people.
After losing their parents, twins Haruka and Sora travel to the countryside to start a new life. The two soon meet new friends in the shrine maiden Akira, wealthy Kazuha and well-endowed Nao, amongst others. As the days go by, Haruka learns more and more about the new ladies in his life, all the while being a patient confidante and good friend, leading him into their hearts, as well as their loins. Meanwhile, Sora can't help but have a recurring memory of her brother kissing her as a child…
Both feature a female lead who is small in stature and has grey hair. They have similar underlying themes that I can't mention without spoiling things but the deeper into the relationships you look the more you'll see they are similar. This shows the strongest towards the end of both anime. Though one has the lead character veer from that romantic 'path' while the other has the lead character "plow" through it... if you catch my drift... Anyway you'll know what I mean if you watch them both. You'll enjoy one if you enjoy the other I promise!
In a world where magic is a reality, the young Louise is at the bottom of her class. Dubbed "Zero" by her classmates at Tristein Academy (due to her zero success rate for magic), Louise (along with all first year students) was charged with summoning a familiar; and instead of a cute magical creature, the familiar arrived in the form of... Saito Hiraga, a normal Japanese boy who was abruptly teleported from his own world?! Can both Louise and Saito come to terms with their new and complicated "relationship" and (more importantly) help Saito find a way home?
They both have two protagonists (who obviously love eachother) having petty arguments. Girl always gets upset when the guy is not there to protect her. Both girls have high ranking families in their worlds. Slightly similar characters. And ontop of that they both have the same seiyuu^^