A duke’s daughter named Faustina regains memories of her previous life on the day of her engagement to Crown Prince Bernhard. She recalls that in that past life, the prince fell in love with her younger sister Elvira, who is as lovely as a fairy, leading Faustina to a bad end. Determined not to repeat her mistakes, she resolves to stop enduring her suffering. She decides to cede the position of crown princess to her sister and live freely according to her own desires.

The story is set in a fantasy noble society where Faustina takes unconventional actions to force the prince to break off their engagement. However, her plans consistently backfire. Contrary to her expectations, the crown prince refuses to end the engagement and begins to show interest in her. Meanwhile, her brother, her sister, and even the second prince start behaving differently than they did in her previous life, weaving a far more complex web of fate than before.

The narrative follows Faustina as she navigates this confusing new reality. She struggles to understand why the people around her have changed. She also encounters figures like Siel, a priest with a hidden agenda, and his close friend Velled, who seems to age differently from others. As deeper mysteries and hidden connections among the characters emerge, the simple goal of breaking an engagement becomes a complicated struggle involving multiple individuals who may also be aware of past loops.