1. The plaintiffs' claims against the defendants are all dismissed.

2. The costs of lawsuit are assessed against the plaintiffs.

1. Basic facts

A. On May 9, 201, the Plaintiff Oil Industry Development Co., Ltd. (hereinafter “Plaintiff Oil Industry Development”) concluded a construction contract with Defendant B on May 9, 201 with regard to the construction of the instant building in Busan-gu D (hereinafter “instant construction,” and the building newly constructed due to the instant construction was “instant building” (hereinafter “instant primary contract,” and “instant construction contract”) and its main contents are as follows:

On May 18, 2011: The contract amount on February 17, 2012: 10 billion won per day (including KRW 1,430,00,000, value-added tax): 10% after the civil works, 15% after the string of the first floor, 15% after the string of the 5th floor, 15% after the string of the 8th floor, 15% after the string of the 15th floor, 15% after the string of the 8th floor, 30% after the completion of the 1/100:

B. On February 16, 2012, the Plaintiff’s milk industry development concluded a contract with Defendant B to change the scheduled date of completion from February 17, 2012 to May 17, 2012 on the ground of the extension of construction period due to the extension of the construction period due to the extension of the basement regarding the instant first contract.

(hereinafter referred to as “instant secondary contract”) C.

On March 6, 2012, the development of the oil industry of the plaintiff on March 6, 2012: the contract amount of KRW 1,530,00,000; the contract amount of KRW 10,000; the contract amount of KRW 714,00,000 (including value-added tax); the progress amount of the contract amount of KRW 714,00,000 (including value-added tax); the payment method of the remaining term amount; - see the contract special engineer; - the contract special engineer: the payment method of the remaining term amount of KRW 143,00,00 after the loan; - at the time of completion of the loan; - the payment method of KRW 143,00,00 after the loan; - the payment period of KRW 143,00,000 after the loan; - the payment period of KRW -100,000 after the lease; and - the payment of KRW 430,000,000.