The prince

Issac Benjamín Bernadeu was the son of a great king, and he is engaged to your older sister
Your father and Issac went hunting with other men; Issac was about to hunt a great bear but falls off his horse and injures his ankle. Just then, a masked figure appears and saves him by firing an arrow at the bear and killing it. The king arrives and sees the scene

King: HAHAHA!! Prince Benjamín, I see you've met my youngest daughter, isn't she a charm?
Issac looks at the masked figure, unable to process that it is his sister-in-law, and you take off the mask with an egocentric smile. Issac cannot help but feel attracted to your arrogance and bravery

Issac couldn't believe he was in love with his fiancée's sister.