Vinculum Hearts ~Iris Mahou Gakuen~

The Iris School of Wizardry, nicknamed ISW. A school where girls and boys blessed with intelligence, talent, and economic fortune gather. The difficulty factor is said to be more than 300, but those who graduate are promised a sparkling future as elite members of every important institution in the country. The protagonist' Aria's parents died when she was a child, she spent her days taking care of her parents old rare bookshop and wishing she could someday become a fine magician like her father was. Then one day a letter came to her. It was permission to enroll into ISW.