If you liked the Maria-sama ga Miteru anime, the Anime-Planet community thinks you'd like:
Ouran High is a school for the extremely wealthy or, in Haruhi's case, the extremely talented. But no amount of talent will help when Haruhi accidentally drops an eight million yen vase in a music room. The vase was the property of Ouran High School Host Club, a group of attractive young men who, for a fee, provide their time and affections for their lovesick clientele: the female students. Fascinated by this strange new specimen, a poor and clumsy commoner, they force Haruhi to work for them until the debt is repaid; but they get a lot more than they bargained for...
This may seem like an odd pairing, but I think the characters in each series are similar. It seems that there is one "normal" character surrounding by a bunch (or at least the person closest) non-normal/rich character. Furthermore, each series takes place in a well to do school. If you want a more comedic version of Maria, I'd say try Ouran.
Best friends Haruka and Yuu have just entered their first year at Misato West High School, a facility scheduled to be shut down in three years. The duo have been inseparable since middle school, but moving to a new school means making new friends. So together, the pair decides they’ll share something special that they won’t do with the other girls: they’ll share a passionate kiss. Now, the two, along with new companions Kotone, Shizuku, Kaede and Yuku, begin their high school days together, having plenty of fun - and sharing plenty of intimate kisses - along the way.
Both shows are about shoujo-ai in a high school setting, but Sakura Trick is more down to earth and lighthearted whereas Maria-sama ga Miteru is more about drama. Sakura Trick is also up front with things like kisses, unlike Maria-sama ga Miteru which mostly settles for subtext and the like.
Still, fans of either show that wants more shoujo-ai in their life would do well to check out the other anime.
In a modern world, magic has become a service industry. From transforming a house, to arranging an article in the newspaper, no job is too big or too small for a mage, who are thought of highly in the public eye. Kikuchi Yume, daughter of a famous mage, has finally reached the age of apprenticeship, and must move to Tokyo to find a mentor. Under the tutelage of the esteemed mage (and nightclub owner) Oyamada Masami, she will learn what it means to be able to bring magic to others' lives.
Kaihe is a high school student who has been given the task of becoming the chairperson for St Luminous, a private religious school for girls, after his grandfather died. Kaihe, along with a friend, arrives at the school to take care of business. But soon, mysterious disappearances start to happen. Will he unravel the mystery of the school and its past before its too late?
Megumi was a normal kid. He enjoyed getting into fights and mixing it up, and one day he did so in defense of a wizard who was being attacked by bullies. His reward was a magical book that was supposed to grant his wish. The mischievous demon inside the book decided to play a prank on Megumi, though, and instead of turning him into "a man among men," he became a girl. Fast forward to five years later, and Megumi is now entering high school, a tumultuous time for even normal teenagers, let alone a girl who is trying to figure out how become a guy again...