Oujo-sama wa Uso ga Osuki

A noblewoman known for her impeccable demeanor is secretly the exiled princess of a fallen kingdom. To blend into aristocratic life, she concealed her true identity a decade ago. At seventeen, the second prince discovers her secret and offers an alliance to restore her homeland. However, instead of a genuine partnership, the arrangement turns into a deceptive engagement. As she navigates this unexpected situation, the former princess begins a journey of personal growth, marked by a blend of romance and subtle twists.