If you liked the Rosario to Vampire Capu2 anime, the Anime-Planet community thinks you'd like:
Akuto Sai enters the Constant Academy for Magick Arts hoping to become a high priest and change the world for the better. But when the school's oracle declares his future profession to be 'Demon Lord', he finds himself feared and hated by the entire student population. Now, instead of making comrades and studying for his exam, Akuto finds himself fighting off monsters, bullies, and well-meaning classmates in various states of undress. If navigating a magical high school as a transfer student wasn't difficult enough, Akuto now has to deal with a cute android ordered to observe him 24-hours a day, the precocious attention of the flying, invisible and naked Keena Soga and the advances of the school's most popular girl. Will he be able to overcome his fate, pass his classes, and mend his friendship with the violent Junko Hattori, or will he succumb to his demonic destiny?
You will like the other one! Both Ecchi with lots of fan service! Also both Harem with lost of girls being attracted to the main character. The main character is a guy. The guy seems weak at first, but in Ichiban Ushiro no Daimaou it turns out the main character is very strong. Also there are many exciting battles that deal with magic. Lastly both are very well scripted and have good stories. Main difference is that Rosario to Vampire is a lot funnier.
If you like Rosario to Vampire you should also like Ichiban Ushiro no Daimaou. They are both in a high school setting and involve characters of a supernatural nature. They both also have a fair bit of comedy thrown in there and revolve around a male main character who is surrounded by women.
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.
The timid, virginal Kouta is a new student at Kunpo High School; and while others in his situation might be a wallflower forever, Kouta has no such luck – he has attracted the attention of the busty Chizuru, who happens to be a fox deity! However, Kouta’s misfortunes don’t stop there; he’s also pursued by Nozomu, a wolf deity. Between being molested, propositioned, having his face shoved between mammoth breasts or witnessing endless panty shots, Kouta must also attempt to maintain his studies – even though all Chizuru and Nozomu want is to be the one to deflower him first!
If you liked the ecchi comedy of the various girls in Rosario to Vampire Capu2 falling for the hapless male lead, then you may enjoy Kanokon. Both series take add a supernatural edge to the standard harem ecchi show, so if you liked this then check out Kanokon.
Keitaro Urashima is somewhat of a failure. In order to fulfill a promise he made to a girl fifteen years ago, he has tried time and again to get into Tokyo U but has never managed to pass the exam. However, fate smiles upon him and he ends up working for his aunt, managing an all-girls dorm! Living with the feral Kaolla, the timid Shinobu, the sake-loving Mitsune, the blade mistress Motoko and the punch-happy Naru, can Keitaro keep his focus and keep his promise? And will he ever end up meeting that girl from his past?
Both Rosario to Vampire Capu2 and Love Hina are very basic, not overly romantic harem "stories". Enjoyed how our male hero got himself in the mid of a group of cute girls for no particular reason other than fate? Enjoyed seeing how he got himself into ecchi accidents aplenty? Did you enjoy seeing the relationship between our lead character and the main female love interest grow with an agonizing speed? Then look no further, this is the anime for you!
Imagine a mansion with a Christmas goods shop that appears out of nowhere, housing three beautiful sisters and a robot maid, all with very different personalities and figures. These sisters are looking for information that they can only acquire from "popotan," their term for dandelion flowers. After acquiring a hint of this information, the mansion and the girls vanish. Their travels take them through many places, and they meet a varied cast of characters during their quest, but what exactly is this information they're searching for so desperately?
Both of these series are very heavy on the fanservice, but manage to be funny as well. While Popotan is a little more Ecchi, both deal with magic and are similar enough that they are worth a look.