The world has fallen. A land swallowed by death and despair. And amidst the ruins stood one man, sword in hand until the bitter end, the Sword God, Karserian Le Vandeyan. But as if guided by fate, a door to another world opened. This time... It was Earth. A world still untouched by ruin. Monsters had begun to creep into the shadows, yet humanity remained blissfully unaware of the catastrophe looming ahead. This world hasn’t ended yet. But the moment they let their guard down, that same horrifying nightmare will return. The Sword God takes up his sword once more to stop it. He begins a new life by borrowing the body of a fragile human. In exchange for that borrowed vessel, he makes a single promise. "I’ll protect your family." And so begins the real story. The battle to save a world that doesn't yet realize it's doomed.