I reincarnated as the heiress of a powerful conglomerate in a novel. The problem? This world is on the brink of destruction due to a monstrous virus. With nothing left but money, I hurriedly bought a mansion in the countryside and began transforming it into a shelter to escape the monsters. But... the world ended far sooner than I anticipated. Damn it! To make matters worse, somehow the male leads ended up trapped in my house along with me. And yet, none of them seem to have any intention of leaving. Why do they look like they couldn't care less about the heroine? "Who exactly are you?" "You seem like someone who knew the world was going to end beforehand." They had a lot of questions about me, but I couldn't answer them. They wouldn't believe me anyway, right? To me, they were nothing more than useful labor resources. "Let's get to work. Pay for your meals with labor!" As long as I find the cure for the virus causing the apocalypse, this hellish time will come to an end. Until then, I'll just keep working these male leads to the bone and endure! But... There's just one problem. It turns out this old mansion I purchased has some very suspicious secrets. What on earth is happening in my house?