1. The Plaintiff:

A. 1 As for Defendant Dongyang Construction Industry Co., Ltd, Defendant Dongyang Construction Industry Co., Ltd, the amount of KRW 377,673,295 and its amount from August 8, 2014.

1. Basic facts

A. The Plaintiff’s status Korea National Housing Corporation (the Plaintiff came to be merged with the Korea Land Corporation on October 1, 2009, and the Plaintiff comprehensively succeeded to the rights and obligations of the Korea National Housing Corporation; hereinafter “Plaintiffs”) constructed and sold the 73-family apartment complexes of the amamamama Village 2 complex located in Pyeongtaek-dong 674, Dong-dong, Dong-dong (hereinafter “instant apartment complex”).

B. On February 23, 2004, the execution of the contract and the completion of the new construction of the apartment of this case 1) Defendant Dongyang Construction, and Cheongdo Construction were awarded a contract with the Plaintiff for the construction of three sections of the new construction of the apartment of this case (hereinafter “the construction of the instant three sections of apartment of this case”), and the Defendant Korea Development is the joint and several liability company under the contract for the construction of Dongyang and Cheongdo Construction.

B) Defendant T.S.C. (former name before the change: Shindong-gu Co., Ltd., and May 12, 201, which was divided and merged with Defendant Taesan Power on May 12, 201.

(3) On April 9, 2004, the Plaintiff’s construction of the instant apartment from the Plaintiff for the construction of the three tools of electrical construction of the instant apartment (hereinafter “the instant apartment construction of the three sections of electrical construction”).

(2) On March 19, 2004, the construction work of the instant apartment building from the Plaintiff is the construction work of the instant apartment building (hereinafter “construction work of the instant apartment building section”) among the construction work of the instant apartment building from the Plaintiff on March 19, 2004.

(B) Defendant South-dong industry, site development is a contractor awarded a contract, and Defendant South-dong industry and site development is a joint and several liability company under the contract for the construction and interest construction. (B) Defendant Promotion Company is a contractor awarded a contract for the electrical construction of the instant apartment construction from the Plaintiff on April 9, 2004 (hereinafter “instant construction section for the instant apartment construction”) among the new construction works of the instant apartment, and the Defendant’s electric construction is the promotion company’s contract.