My Engagement Was Called off Under False Accusations, but Who Ever Said My Face Was Ugly Beneath the Mask?

Katya has always hid her face under a mask during her days at the academy. Now, right in the middle of the graduation party, her financé the First Prince calls off their engagement, accusing her of being as mean-hearted as her ugly appearance. But he should've thought twice, because after all, who ever said beneath the mask was an ugly face?