On the battlefield, where I was struggling miserably as a young mage soldier, the memories of my past life suddenly returned. And with them, the realization that this world is actually the setting of the novel <The Sword Planted Above the Ruins>. Of all things… why did I have to transmigrate into a war novel that ends with a mass extinction in the apocalypse?! To avoid that horrifying ending, I must stick closely to the hero, Leviathan Jebert, and keep a close eye on him so he doesn’t die. “Sir, do you happen to need a youngest child in your household?” After countless twists and turns, I finally managed to become the youngest child of the Jebert Duchy. But the problems are… I’m a mage—something Leviathan absolutely despises I’m a deserter who fled the battlefield And due to a misunderstanding, I even had to change my gender If they find out, I’ll be kicked out immediately, so I have to be extremely careful… But this family won’t leave me alone for even a moment. I’m already busy enough trying to find a way to protect Leviathan… But first, strawberry cake… Right, delicious! The soft little northern bunny-fairy troublemaker <The Youngest Is Hiding A Lot Of Things>