A story of an older sister's complaints: Her younger sister, who is always saying "unfair, unfair" as a habit, declared to the crown prince who is her fiancé that he was her lover in a past life and her destined person, so it's wrong for you to be the fiancée—hand him over. So the older sister gave him to her as she wished.

My younger sister, who always selfishly took away my things, had a habit of saying that I had a destined person. She claimed that my fiancé, the Crown Prince, was her destined person, that she was a saintess, that the Crown Prince was the reincarnation of a hero, and that they had sworn to be together when reincarnated—so she demanded that I give up my fiancé to her. When I reluctantly told my fiancé about this, the engagement was broken off...