1. All of the plaintiffs' claims are dismissed.

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

1. Basic facts

A. On June 16, 2017, Plaintiff B, Plaintiff C’s in-house director E, and Plaintiff A’s representative director F entered into a design service contract (hereinafter “instant service contract”) with Defendant and G hotel (hereinafter “instant hotel”) setting the service cost as KRW 550 million (excluding value-added tax) in relation to the design of the instant hotel.

The part related to the instant service contract in relation to the instant case is as follows.

Article 2 (Contents of Building Design) (1) : The period from August 2017 to the time when the approval for use is completed (the date of the contract) (the scheduled January 2020)

1. Deadline for receipt of construction deliberation: By August 2, 2017;

2. Deadline for receipt of building permits: By September 1, 2017;

3. Deadline for completion of building permission: by September 30, 2017: (2) Total floor area: approximately 16,500 square meters. (3) The scope of services provided by plaintiffs B and F.

1. Preparation for, and deliberation and management of, architectural deliberation books;

2. Preparation of construction permit books and permission management (including outsourcing content, such as architecture, structure, civil engineering, energy, machinery, electricity, communications);

3. Preparation of a drawing for construction works;

4. The scope of performance of services, such as the performance of services, such as the performance of services, by single female.

1. Preparation and management of a building plan (a ground plan and elevation drawing) Article 3 (1) (2) The service charges shall be paid as follows:

1.The amount of KRW 55 million shall be paid on the contractual date;

2. The first intermediate payment of KRW 93.5 million shall be paid within two months after passing through the construction deliberation;

3. The second intermediate payment of KRW 181,50,000 shall be paid within one month after a building permit is completed;

4. The third intermediate payment of KRW 165 million shall be paid at the time of making a construction permit for two months after the building permit.

5. Balance 5 million won shall be paid upon completion of the approval for use.

Article 4 If it is necessary to modify the design due to unavoidable reasons during the construction design and construction drawings, the defendant may request F and B to modify the design, and F and B shall reflect the defendant's request to the maximum extent possible to the extent possible to the extent possible, and may claim the defendant to reimburse the expenses necessary for the modification of the design according to the period.

B. Plaintiff A was established on June 19, 2017 and was under the FF’s contract.