The defendant shall pay 5,00,000 won to the plaintiff and 12% per annum from October 8, 2019 to the day of complete payment.

Comprehensively taking account of the overall purport of the arguments in Gap evidence Nos. 1 through 3, the defendant subcontracted to the plaintiff (mutually: C) on December 15, 2018, the construction of the windows and glass among the new construction of Gwangju-si, E, and F Multi-household Housing. The construction period from December 20, 2018 to June 30, 2019, and the construction amount is KRW 115,000 (the defendant's dispute that the above construction amount is KRW 90 million is not accepted) and the plaintiff completed the above construction work around July 2019.

Therefore, the Defendant is obligated to pay the Plaintiff KRW 5 million (i.e., KRW 15 million - KRW 60,000 - KRW 60,000 - KRW 60,000) with the exception of the amount of the above construction cost of KRW 115,00,000 (i.e., KRW 115,000 - KRW 60,000) (i.e., the Defendant did not submit any evidence to the effect that he/she paid KRW 65 million to the Plaintiff), and as regards the above KRW 55,00,00 and damages for delay calculated at the rate of 12% per annum under the Act on Special Cases Concerning the Promotion, etc. of Legal Proceedings from October 8, 2019 to the date of full payment).

It is so decided as per Disposition by the assent of all participating Justices, on the ground that the plaintiff's claim of this case is reasonable.