The engagement I annulled is, with the princess!? (Associated Names)

Yulia Meride Rirossa, the princess of the kingdom of Rirossa. Yulia, who changed her name, hid her identity as a princess, and went to the school, is the fiancée of Duke Lucias’s heir, Abel Lucias, who also didn’t know her true identity. ⌈Yulia Rose,…… I annul my engagement with you!⌋ Before I know it, my…