If you're looking for anime similar to Rosario to Vampire, you might like these titles. All recommendations are made by Anime-Planet users like you!
Takasu Ayako can handle anything; duels with foreign powers and assassination attempts don’t faze her. But can she handle falling in love? Fellow students at the prestigious school for Beatrice users are shocked to hear that their "Angel of Death" Ayako, who has never even shown a smile before, has fallen in love at first sight with the diminutive freshman Yoshimura Mamoru. Mamoru must decide how to respond to the sudden confession of love, the resulting fascination of his fellow students, and the dangers of being near Ayako. Will his own powers ever measure up?
In both series the main girl character is the one of strongest of all and protect the main character, what obviously annoy him (because he is much weaker). In both anime the main girl and guy fall in love with each other, but because of the surroundings they cannot be with each other alone (fiends are always with them and watch them). The both anime are great anime (on very similar level) and I think if you like one of them you like the other.
In Both shows main heroine is a powerful being, able to easily destroy any enemies, that devotes herself to protecting main protagonist who is weak.
Also in both cases it's a romance between highly renowned lady and a commoner.
Aika Sumeragi is still in high school, but having already earned her C-class salvager's license, she has no need for career counseling. While Eri, the class president, takes a dim view on Aika advertising her services at school, she seems to have no qualms about hiring her herself on behalf of the school's Treasure Hunting Club. A girl named Karen has mysterious tattoo which contains a hidden clue to the whereabouts of something unknown, and after packing their short skirts and panties, the club sets out on a journey to discover the answer; but not everyone on board is who they seem to be. Aika's first job is turning out to be far more serious than she originally thought; and thus, her illustrious career as a panty-flashing secret agent begins!
Both of these shows have large chested women, and plenty of pantyshots! The characters are all noticeably different, and the women are very strong willed. Also both have plenty of action and fiction.
Aika are-16: Virgin Mission and Rosario to vampire both have the same type of action scenes with strong independent characters who are able to fight the ‘bad’ guys around them. And for you guys, panty shots galore!
Both anime have similar plots to the relationship. In each case the "Man" is a unique indivdual who is the only one that can be present with the givin situation. In infinte stratos Ichika Orimura is the only man on earth who can pilot an IS system, while in Rosario Tsukune Aono; is the only male human attending the school. In both anime the relationships are very very blunt, but its worth a watch to get a chuckle in.
Both anime have a male protagonist, surrounded by girls fighting over him. The feeling is similar in both animes, tho a bit different. The hillarious situations that Tsukune and Ichika get themselves into are always embarrassing and that's what makes them funny and makes you laugh. I recommend watching both animes if you like comedy and school-like anime.
Both of these series involve a variety of half human characters who band together and become friends. They are all trying to fit in with humans by going to school and doing other human activities.
Both Inu X Boku SS and Rosario to Vampire share many similar plot points such as: They both deal with monsters in human form and their relationships, they both have a comedic element to them as well as a romance element, and they both discuss the part monster/part humans relationships with regular humans. I would definitely give one a try if you like the other. Inu X Boku SS does have a bit more romance than comedy though, while Rosario to Vampire is a little more comedy driven.
All the perverted Issei wants is to squeeze bountiful boobs all day long, so he's thrilled to join Kuou Academy, a once all-female high school filled with gorgeous girls. But little did the boy know that after finally getting a girlfriend, she'd turn out to be a fallen angel who'd drive a lance through his heart, killing him on the spot! Luckily, the beautiful and busty Rias, his popular classmate who's actually a demon, revives him under one condition: that he'll become her servant. Now, Issei finds himself in the middle of a fierce chess game between demons, fallen angels and exorcists, and the fates of his new friends lie in the balance!
Both have a supernatural monsters in it. Rosario+Vampire is more about a Harem where a normal kid is surrounded by a bunch of girls who are monsters. High School DxD is about a boy who gets turned into a demon by a girl. Both series have lots fighting in it.
Very similar surroundings and story. Both are in "schools", one's got Demons (Highschool DxD) the other's got Vampires, Succubus etc. (Rosario to Vampire).
Both are ecchi although Highschool DxD beat Rosario to Vampire with quite a bit in terms of.. visuals. There's most definitely romance in both of the animes, but you're going to have to see how it goes for yourself. :)