After having her fiancé stolen by a nouveau riche heiress, Countess Estelle seeks a new fiancé at a ball. There she catches the eye of the prickly Prince Arkleyin, who uses her unique ability to sense mana and emotions as a convenient early warning system, forcing her into a fake engagement and showering her with (acted) affection. This is a story of a twisted prince who learns about love and becomes obsessed with the heroine. Estelle possesses the unique ability to visually perceive the mana and general emotions of living beings, but keeps it a secret. At a ball to find a new fiancé after her previous one was stolen, her ability is discovered by Prince Arkleyin, who uses her as a convenient early warning system and forces a fake engagement, showering her with affection. This is a story of a twisted prince who learns about love and becomes obsessed with the heroine.