Reiguu Sareru Okazari Ouhi ni Naru Hazu Deshita ga, Hatsukoi Ouji-sama ni Sarawaremashita!

Noelia, the daughter of a duke, is falsely accused and her engagement is annulled, and she is to be married off to the king of a neighboring country. Noelia was meant to become the neighboring country's "figurehead queen"... But then, suddenly, a man kidnaps her. He seems to know Noelia, but with no memory of her past, Noelia has no idea who he is. Even so, when she sees him, she feels so sad she wants to cry... A love story between a crown prince who was supposed to have been wiped out and a young lady who has lost her memory!

(Source: Kodansha, translated)