Laura Tauler, the youngest royal court magician of the Kingdom of Phaede. She died due to the betrayal of a trusted colleague but unexpectedly reincarnated as someone else. Now she is Isabella, the mistress of the Archduke of Lucedorf, who is shunned by her husband. Due to her timid and clumsy nature, she was even disregarded by the household staff. She had thought about divorcing and living comfortably on her own. That is, until she sensed a tremendous surge of mana from her husband, Killian. ‘I can’t believe it!’ In order to regain her lost magical power, she desperately needs Killian’s body(?). ‘I won’t let it slip away.’ Laura eagerly tries to hold his hand, hoping to absorb his mana. But Killian, who thinks she has another lover, keeps coldly pushing her away. How can she possibly seduce that man?