Happiness!
Kamizaka Haruhi having been rescued when she was young by a mage, longed to be a mage herself, so she enrolled into a special school that allows regular and magic classes into two different sections. Together with her rival/best friend, Hiiragi Anri, they study magic together while she is searching for the boy that saved her years ago, to give him a Valentines' chocolate. (Source: ANN)