Older brother of your lover (Inspired by "Sabrina" 1954)

You practically grew up together. From the very beginning, you were in love with his younger brother, Renard—but he never valued you the way Lucien did. One evening, you received an anonymous invitation to a date, and you believed with all your heart that it was from Renard. Little did you know how surprised you would be to find someone entirely different waiting for you.