1. All of the plaintiffs' claims are dismissed.

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

Basic Facts

The open spatial design (hereinafter referred to as “heat spatial design”) is a company that runs a construction business, such as interior, and Defendant M and N are the orderer that entered into a contract for open spatial design and each interior facility construction as set out in the following sub-paragraph (b), and DefendantO is a person registered as a business entity of “P” as set forth in the following sub-paragraph (c).

The Plaintiffs have each claim for the construction price as stated in the attached Table “the amount of claims” against the currently open space design, as the contractors who have been awarded a subcontract from the open space design.

On October 25, 2012, the open space design and the open space design for a construction contract between the defendant M M have been awarded a contract by determining the internal facilities construction cost of KRW 380 million (excluding value-added tax) and the construction period of construction from November 1, 2012 to January 5, 2013 as the price for the interior facilities construction of the "Rinu restaurant" located in Q 9 from the defendant M M in Asan City.

(hereinafter referred to as “instant First Project”). The open space design agreed to perform additional construction works over two occasions with Defendant MM during the course of the instant First Project and to receive KRW 12 million and KRW 13 million in return.

Defendant M paid the price for the first and the first additional works in this case.

On August 13, 201, the open space design and the open space design for a construction contract between Defendant N and Defendant N received a contract with Defendant N during the construction period of KRW 1.5 billion for the internal facility construction work of “P (Ssawsawbsaw restaurant)” on the third floor of Yeonsu-gu Incheon S 1E-dong, Yeonsu-gu, Incheon, and between September 2, 201 and November 15, 201.

(hereinafter “instant Second Corporation”). Open Space Design and Defendant N determined the value-added tax on the construction cost of the instant Second Corporation as KRW 98 million, and the portion of the open spatial design repaid in lieu of Defendant N’s personal debt of KRW 13 million is included in the construction cost of the instant Second Corporation.

DefendantO’s aforementioned “P” on January 20, 2012.