1. The plaintiff's appeal is dismissed.

2. The costs of appeal shall be borne by the Plaintiff.

The purport of the claim and appeal is the purport of the appeal.

1. Basic facts

A. (i) The Plaintiff entered into a contract for the design of the E-sports Culture Center (hereinafter “the first contract”) with the Defendant on March 7, 2012, jointly with C Co., Ltd. (hereinafter “C”), which is a certified architect who carries out the design, etc. of the building in the name of “B,” and agreed to receive KRW 178,042,00 (including value-added tax; hereinafter the same shall apply) and the contract amount from March 9, 2012 to August 15, 2012 (hereinafter “the first contract”). At the time, the Plaintiff entered into a contract for the design of the construction (hereinafter “the first contract”) with the E-sports Center, a sports facility (sports facility) (hereinafter “the sports facility”). At the time, the Plaintiff, among the above services, share the building structure incidental facilities, C’s telecommunication and fire-fighting facilities, and receive 88% (156,67,000 won) and 12% (21,365,000) of the contract amount from the Plaintiff and C.

Sheet Defendant paid 89,020,000 won to the Plaintiff and C on March 20, 2012.

On July 18, 2012, the Plaintiff submitted a termination report to the Defendant on July 24, 2012, while completing working plans and preparing and leaving supply procedures. On July 25, 2012, the Defendant notified the Plaintiff of the suspension of design services on the grounds of the design advisory committee deliberation.

B. (1) A dispute over the conclusion of a modified contract and the number of service payments (i.e., the Defendant decided to change the use of a building from a sports center to an exclusive use site of Eddton. Around July 28, 2012, the Plaintiff instructed the Plaintiff to modify the design in accordance with the order. The Plaintiff commenced the design service of Eddton exclusive use site, such as Eddton-only field answers. On October 24, 2012, the Defendant and the Defendant entered into a contract with C to change the service with the Defendant to increase the contract amount to KRW 289,60,000 on the ground of an increase in the volume of business on October 24, 2012, the contract to change the service amount to KRW 289,60,000 on June 20, 2014 and the extension of the service period on September 11, 2014 (hereinafter referred to as “revision contract”). The Plaintiff received progress payment from the Defendant on June 30, 2019, 2014.

Dor. The plaintiff is an amendment to the contract.