With the power of my amulet, I will save my beloved brother! Mana, a sickly high school girl, faints while reading the final volume of her favorite novel, Grand Aver... Before I knew it, I had been reincarnated as Leticia, the younger sister of Serios, the ice prince who died tragically as the final boss of the novel!! Still sickly after reincarnation, Leticia decides to avoid her own mortality while saving her beloved brother Serios. Every day is busy making cheat charms, making contracts with fluffy spirits and talking holy swords...!? A death flag avoidance fantasy by a magical cheat genius daughter who is doted on by her most recommended brother!!