1. The Defendant shall pay to the Plaintiff KRW 26,40,00 and the interest rate of KRW 15% per annum from December 15, 2015 to the date of full payment.

According to the facts without dispute between the parties, Gap evidence Nos. 1 through 4, and the whole purport of oral arguments, the plaintiff entered into a subcontract construction contract with the defendant on September 16, 2015 by stipulating that "the construction cost: 52,800,000 won (including value-added tax)" among the new construction works of neighborhood living facilities located in Goyang-si, Seoyang-gu, Seoyang-si, 245-79, and the construction period: The plaintiff received from the defendant on September 16, 2015; the payment method from August 15, 2015 to November 15, 2015; and the payment method: 26,400,000 won within seven days after the conclusion of the contract; and the plaintiff received advance payment from the defendant on September 25, 2015; and the plaintiff completed the subcontract construction work.

According to the above facts, since it is apparent that the plaintiff completed the subcontracted construction and the 15 days have passed since the completion date of construction, the defendant is obligated to pay to the plaintiff the remaining construction cost of 26,400,000 won and damages for delay calculated at the rate of 15% per annum from December 15, 2015 to the day of complete payment.

Therefore, the plaintiff's claim is reasonable, and it is decided as per Disposition.