Help me find a Manhwa i forgot the title i wanna read it again

the female lead is a white haired long hair and like the adopted daughter of a duke she became a swordmaster, and she's actually redhead in her past life and the demon lord or something gave her a necklace she can choose talent she chose to be a swordmaster, she attended a sword academy or something in disguise as a guy, and the male lead was also a duke wolfcut hair black haired with blueish tint also a swordmaster. The body she reincarnated to is a chubby girl because her fake friend maked that girl chubby so when she goyt reincarnated to that body she exercised a lit and get her revenge to that fake friend and her so called prince fiance help me please