Another broken engagement? My fiancé was taken by my younger sister, whose catchphrase is "unfair, unfair." This was the third time, but well, it's fine... this time.

My cute-faced younger sister, and me, an unremarkable older sister—my younger sister was always taking away my fiancés. This time I was chosen as the betrothed of the Crown Prince I had admired, but I was told to break off the engagement because his true love had appeared. Is it my younger sister again? This is the third time, but fine, fine. This time, I'll...