Of Princes and Promises (St Rosetta's Academy) by Sandhya Menon

When Caterina finds out Alaric is taking a supermodel to the upcoming gala, she knows she cannot arrive without the perfect date. But the thought of taking another superficial St. R's boy exhausts her. The solution? Sweet-but-clueless Rahul Chopra and a mysterious pot of hair gel with the power to alter the wearer into whatever his heart desires.

When Rahul tries it, he transforms instantly into RC-debonair, handsome, and charming. But transformation comes with a price: As Rahul enjoys his new social standing, the line between his two personas begins to blur. Will he give up everything, including Caterina, to remain RC? Or will this unlikely pair find their way back to each other?