Dase to Iwareta Reijou no Kareinaru Henshin

Clarabelle, who grew up in the countryside, skipped a grade to enter the academy in the royal capital in pursuit of her fiancé Alan, who is from the same hometown. But as soon as she enters the school, she witnesses Alan cheating on her! He dismissed her, saying "I have no love for a plain, unsophisticated woman like you." As Clarabelle was still crying from the shocking breakup, Victoria, the third prince's fiancée, consoles her. Victoria takes her to the student council chamber, where she meets Lloyd, a handsome but foul-mouthed classmate. "I want a makeover, and become a proper lady." Starting with her encounter with Lloyd and Victoria, Clarabelle will embark on new lessons to find her true love destiny! (Source: Kurofune Pixiv, translated)