I regained the memories of my past life on a battlefield where I was suffering through hell as a child soldier mage. I also realized that this place was inside the novel, <Sword Piercing the Ruins>. Why did I have to possess a character in a war novel destined for an apocalyptic “Total Annihilation” ending, of all things?! To avoid that gruesome ending, I need to stick like glue to the “Hero,” Leviathan Siebert, and keep a close watch to ensure he doesn’t die. “Mister, by any chance, do you need a new youngest child at home?” After many twists and turns, I managed to enter the Siebert Duchy as the youngest. However, considering: I’m a “mage,” the very thing Leviathan loathes I’m a deserter from the army And my gender has been switched due to a misunderstandingI have to be careful, and then careful again, to ensure I don’t get caught and kicked out… But the people in this family just won’t leave me alone for a single second. I’m busy enough just trying to find a way to protect Leviathan, but first, let me eat this strawberry cake… Yeah, it’s delicious!