Kei To Ayakashi

Kei To Ayakashi summary:

The Shiranoi family has made a living for generations as exorcists, borrowing the power of the Ayakashi that resides in a sword. However, the protagonist Kei was unable to draw the sword during childhood and was rejected by her father, Ryuichi, who claimed she was not worthy of becoming the next head of the family. But hidden within her father's actions is a certain secret...