Kaedama Youjo wa Jiyuu ni Narimasu!

Nina Lindra is a gifted student and skilled magic user, but she has a secret that no one can find out. She often disguises herself as her adoptive sister, Lilia Lust, even taking her exams in her place, at the request of the Lust family. When the kingdom’s queen requests Lilia to heal her ailing son, Nina once again steps into her role, using her powers to ease Prince Erland’s pain. As Nina tends to him, she discovers the warmth hidden beneath Erland’s icy facade. But as feelings grow and a charming foreign prince enters her life, Nina must face the hardest choice. Will she continue living a lie, or risk everything to be herself? (Source: WEBTOON)