A. On September 9, 2015, the Plaintiff entered into a contract for construction works with Defendant A and B by setting the construction cost of KRW 580,000,000 and the construction period from October 16, 2015 to April 30, 2016, and completed the said construction works.

B. Defendant A and B paid KRW 490,000,000 to the Plaintiff out of the construction cost as above.

C. On November 30, 2016, the Defendants drafted a note of payment that the Defendants shall pay the Plaintiff the amount of KRW 90,000,000 payable to the Plaintiff by December 23, 2016.

[Reasons for Recognition] The entry of Gap evidence No. 1 and the purport of the whole argument

2. According to the facts found in the determination as to the cause of the claim, the Defendants are jointly and severally liable to pay to the Plaintiff the amount of KRW 90,00,000,000, the amount of KRW 43,560,750 remaining excluding the amount of KRW 46,439,250 that the Plaintiff was directly paid by sewage suppliers, and the damages for delay calculated at each rate of 15% per annum as prescribed by the Commercial Act from December 24, 2016 to December 4, 2017, the date following the payment due date under the above payment rejection letter, which is the day following the delivery date of the copy of the complaint in this case, and from the next day to the date of full payment.

3. In conclusion, the plaintiff's claim is reasonable, and it is so decided as per Disposition.