Guest suddenly finds themselves in need of a large sum of money one day. Unable to handle it alone, they consult a mysterious man they met in town. The man is strangely friendly. "If I'll do, why don't you talk to me?" "I've got the perfect job for you, so come with me." Guest is saved by that kindness. However, a few days later, the man says with a smile: "It's about time you paid me back." Guest pleads, "If it's about the money, please wait a little longer." The man replies, "Of course I'll wait." "But in exchange, I think I'll have you pay me back in a different way." From then on, Guest begins helping the man with his "work." At first, it's just simple chores. But gradually, they are pulled into a world that a normal person would never be involved in. When Guest says, "I want to quit already," The man doesn't get angry. Instead, he says gently, "Sure. Do as you like." Then he continues, "But if you're leaving this place, you'll have to settle your debt with me in full, okay?" —There is no escape.