1. Each of the plaintiffs' claims against the defendant are dismissed.

2. All the costs of lawsuit are assessed against the Plaintiffs.

1. Basic facts

A. In 2014, the E Association (hereinafter “instant association”) awarded a contract to the Defendant for the new construction of the Yongsan-gu Seoul Metropolitan Government F commercial building (hereinafter “instant commercial building”).

From March 10, 2014, the Defendant started the construction of the instant commercial building from around March 10, 2014.

B. Plaintiff C is the president of the instant association, who is the representative of the association members.

On July 31, 2014, the instant cooperative entered into a supply contract with Plaintiff C and the instant commercial building to supply each of the KRW 1,728,180,00 (the share amount of KRW 1,728,180,000 (the share amount of KRW 1,728,180,000), and the store of the instant commercial building to KRW 1,443,660,00 (the share amount of KRW 1,520,546,415, the share amount of KRW 76,86,415), respectively.

C. On October 30, 2015, the instant association entered into a supply contract with Plaintiff A and the instant commercial building to supply the I shop for KRW 1,018,410,000.

On December 19, 2015, the instant association entered into a supply contract with Plaintiff B and the instant commercial buildings, which would supply Jhoho Lake stores for KRW 863,770,000.

On July 10, 2017, telecommunications cables around the instant commercial building, which had a large number of rains, were flooded and flooded, caused the occurrence of an accident in which rainwater flow into the inside of the first floor above the instant commercial building was damaged by the corridor ceiling and flooring materials of the first floor above the underground.

E. As of July 18, 2017, the Defendant’s site manager of the instant shopping mall prepared a letter of commitment (hereinafter “instant letter of commitment”) with the following content and issued it to the Cooperative.

On July 10, 2017, I undertake to change the ceiling of G and H and I as well as of the head of J and its front corridor within one week after the completion inspection (scheduled July 28).

F. Around July 31, 2017, the instant trade association provided the sales guidance for the period of the sales of the instant commercial building from August 1, 2017 to September 14, 2017.

(g) On July 31, 2017, the head of Yongsan-gu Office is the 9th underground floor and the 39th ground floor.