1. All appeals by the plaintiff (appointed party) are dismissed.

2. The costs of appeal shall be borne by the Plaintiff (Appointed Party).

1. The defendant's judgment on the main defense of this safety objection is deemed to be unlawful as the appeal by the appointed party C and D is unlawful, and thus, the main defense is examined as to this.

Unless otherwise stipulated in the agreement at the time of the selection of the appointed party, the effect of the selection shall continue until the end of the lawsuit (see Supreme Court Decision 2003Da34038, Nov. 14, 2003). Since there is no evidence that the appointed party C and D agreed on the limitation of the instance when selecting the Plaintiff as the designated party, the effect of the selection shall also extend to the appellate court.

The plaintiff omitted the portion of appeal filed by the designated party C and D in the initial petition of appeal, and subsequently corrected the purport of appeal by adding it on October 1, 2015.

Therefore, the appeal of this case filed by the plaintiff as the designated party is lawful, and the defendant's main defense is without merit.

2. Judgment on the merits

A. Basic facts 1) The Defendant changed the Defendant’s trade name from “J” to the current trade name on March 30, 2014. On October 15, 2012, E Co., Ltd. (hereinafter “E”).

2) Of the construction work of cooking, freezing and food plant extension works ordered by the company from the company, F Representative G (hereinafter “F”) is the construction cost of 237,000,000 won (excluding value-added tax)

(B) In the event that there was an increase in the construction amount in KRW 302,00,00 (excluding value-added tax) between G and G on March 29, 2013 as a result of a design change, the following contents are stipulated as special terms and conditions. (c) In the process of the construction work, there was an additional increase in the construction amount in addition to KRW 302,00,000 (30,000), the additional construction amount should be included in the total contract amount without any change and no additional construction amount should be claimed.