Kain Rivel was an ordinary guy—until he died and woke up as a sickly villager in The Blade of Eternity, a fantasy novel he once read. Far from the invincible protagonist, Leon Valtor, Kain is a powerless extra destined to fade into obscurity. But fate has other plans. Through sheer dumb luck and bizarre misunderstandings, Kain survives disasters that leave others in awe, sparking rumors of his “hidden strength.” Enter Mya Seraphine, the novel’s fierce yandere heroine, meant to be Leon’s soulmate. Instead, she fixates on Kain, mistaking his frail existence for unshakable mystery. As Mya’s obsession deepens and the world hails him as a legend, Kain just wants to survive another day—preferably without her carving his name into anything bloody. A darkly funny tale of weakness, misadventure, and a love he never asked for.