Maken-Ki! Battling Venus
マケン姫っ! (original)
Takeru is a new student at the Tenbi Academy, a school where Elemental magic and powerful weapons called "Makens" are used in student duels. Studying will be difficult: his roommates are three beautiful girls who alternately love him and want him dead.
Starring Tomoaki Maeno, Iori Nomizu, Noriko Shitaya, Hitomi Harada, Sayuri Yahagi, Misuzu Togashi, Mina
Watch "Maken-Ki! Battling Venus" on Hulu Plus released in 2011. It's a animation and comedy show, and has a rating of 5.8 out of 10 from Imdb which is fairly okay for this kind of show.