Trapped as a young mage-soldier in a novel destined for a catastrophic ending, I regained memories of my past life. To avert global annihilation, I must protect the "Hero," Leviathan Zebert. I managed to be adopted as the youngest child of the mage-hating Zebert Ducal family. However, I am hiding three crucial secrets: I am a mage, a deserter, and I am disguised as a boy. My new family is dangerously unpredictable, leaving me constantly on edge. Now, I must navigate their chaotic household while desperately keeping my identity hidden and finding a way to save the world—though a slice of strawberry cake is always a welcome distraction.