Sereniel, a beautiful princess beloved by the people, one day fell under an unknown curse that left a hideous scar on her face. Because of this, she became known as the “Monster Princess” and was despised by everyone. Even her own parents shunned her, and as she became increasingly isolated, the only one who continued to treat her the same as before was the knight, Kassel. Due to the guilt she felt from her cursed appearance, Sereniel gave up on her feelings for Kassel. However, at a party one night, she encountered Kassel who had been drugged with an aphrodisiac, and they ended up spending the night together. Afterwards, by royal decree, the two were married, but Sereniel continued to be tormented by a strong sense of guilt, believing she had stolen Kassel’s chance at a happy future. Wanting to set him free, Sereniel asked Kassel for a divorce. But his response was completely unexpected. “I have no intention of letting you go.” Convinced that she could never be loved, and Kassel, who couldn’t bear the thought of losing her— What will become of this heartbreaking and bittersweet love story between the two?