1. The Plaintiff (Counterclaim Defendant) paid KRW 51,084,666 to the Defendant (Counterclaim Plaintiff) and its related amount from October 16, 2014 to December 12, 2014.

1. Basic facts

A. On March 7, 2011 and July 8, 2011, the Defendant was awarded a subcontract for the construction work as indicated below (hereinafter “instant construction work”) from Non-permanent Housing Co., Ltd. (hereinafter “Non-permanent Housing”) and Dong-dong Housing Co., Ltd. (hereinafter “Dong-dong Housing”).

On March 7, 2011, the contract price for the construction project (unit: 327,00,000,000 from among the incidental construction works for the construction works for the construction works for the construction works for the Bupyeong-gu Housing Unit on March 7, 201, among the incidental construction works for the construction works for the construction of the Bupyeong-gu Housing Unit on March 7, 201, the total of 316,000,000 incidental civil construction works among the incidental construction works for the construction works for the construction of the Bupyeong-gu Housing Unit Unit Unit Unit on March 7, 201, the total of 327,000,000,000 from among the incidental construction works for the construction works for the construction of the Bupyeong-gu Housing Unit 2-ju apartment on July 8, 201, the total of 39,000,000-70-70-7, 00-70-7, 00-70-7,00-7

B. Meanwhile, between the Defendant, the Plaintiff, and B, as indicated in the following table in relation to the instant construction works: 103,408,000 (total sum 142,408,000) : 39,400,000 (total 142,408,000) ; and 39,400,000 (total 1,408,000) ; and 159,215,000 ; 157,000 ; 57,000 ; 57,000 ; 215,00 ;

[Ground of recognition] Facts without dispute, entry of Eul evidence Nos. 1 and 4 (including virtual numbers; hereinafter the same shall apply), the purport of the whole pleadings

2. Determination as to the cause of the principal claim

A. The plaintiff 1 is a summary of the parties' assertion.