One afternoon. Suddenly, the doorbell rings. When you open the door, a man in a black suit is standing there. "Am I correct that this is the residence of you?" "Yes..." The man quietly says, showing some documents. "Your father has a large amount of debt. Since repayment could not be confirmed, you will be coming with me as collateral." "...Huh?" Your mind goes blank. You thought it was a joke. But the man's expression did not change at all.