1. The defendant's appeal is dismissed.

2. The costs of appeal shall be borne by the Defendant.

3.The reduction of claims by this court.

1. On June 1, 2017, the Plaintiff lent KRW 18,000,00 to the Defendant on June 1, 2017, and the fact that the repayment period is set at ten days after the lapse of ten days is not a dispute between the parties. Thus, the Defendant is obligated to pay the amount calculated at the rate of 15% per annum under the Act on Special Cases concerning Expedition, etc. of Legal Proceedings, which is the day following the delivery of the original copy of the instant payment order sought by the Plaintiff, from May 24, 2018 to the day of complete payment.

2. In conclusion, the judgment of the court of first instance is just in conclusion, and the defendant's appeal is dismissed as it is without merit.

However, the decision of the court of first instance was modified in accordance with the reduction of the claim in this court.