1. The Plaintiff:

A. Defendant Seoul Guarantee Insurance Co., Ltd.: KRW 177,223,454 and its related amount from June 11, 2015 to June 2018.

1. Basic facts

A. 1. The Plaintiff (the contractor and the trade name before the change) (the contractor: the third party company) on January 22, 2014 (the contractor; hereinafter “pre-construction”) signed a main contract and the main contract was rescinded.

(2) The construction project of this case (hereinafter referred to as the “instant construction project”) and the Yongsan-gu Seoul Metropolitan Government ground neighborhood living facilities and detached houses

(1) A contract for construction works, the construction cost of which is KRW 2,843,50,00 (including value-added tax) and the construction period of which is from January 27, 2014 to October 27, 2014 (hereinafter “instant contract”).

(2) On February 11, 2014, the Plaintiff entered into a construction permit for the instant construction from the head of Yongsan-gu on August 20, 2013, and paid KRW 284,350,000 for advance payment (contract deposit). (2) On August 20, 2013, the Plaintiff was implementing the instant construction under the condition that it maintained the existing retaining wall (hereinafter “the retaining wall of this case”) located on the site of the instant construction.

Even in the terms of the contract of this case, the removal and new construction of retaining walls of this case were not included.

3) After receiving a report on the commencement of construction on March 7, 2014, the first-aid construction began on or around the 10th of the same month, but the construction was not carried out on the ground that it is difficult for the first-aid construction to maintain the retaining wall of this case, even if the construction did not proceed, even though the construction did not run. Design and supervisor B (hereinafter “supervisor”).

(4) From May 22, 2014 to June 28, 2014, the construction of the instant retaining wall was permitted to alter the building, and accordingly ordered the construction of the retaining wall. However, prior construction was resumed after removing the retaining wall without the instant supervisor’s approval on May 26, 2014. On May 29, 2014, the construction of prior construction was permitted to alter the construction with the purport of maintaining the retaining wall of this case and expanding the parts that partially cut off to the extent necessary for the construction. 4) from May 29, 2014 to June 28, 2014.