Karma Goldwyn-Adewale returns to the world of wealth, facing pressure to marry Naoya Zenin to secure her mother's inheritance, who's growing more to be like his uncle and father than she initially thought. Tired of high society's constraints, she reconnects with Nanami Kento, a man she's can't say whether she loves or not. She just doesn't want her half-sister to marry him. Nanami suggests an alternative option: marrying the son of a notorious assassin who goes the Sorcerer Killer, a former Zenin who long left the clan.