Dear Magi -Mahou Shounen Gakka-

A girl studying to be a master at a magic school gets tasked with the job to manage magic students. While she is expecting to be the master of magic girls, what she gets is actually seven teenage guys. Dear My Magical Boys is not just a simple visual novel. It also includes battles that help level up the master and give out items as rewards. The guys' splendid outfits can even be styled as the master likes!

[from Go Nintendo]