1. The defendant shall jointly and severally with the non-party C Co., Ltd. to the plaintiff KRW 20,000,000 and its amount from November 24, 2016 to November 2019.

1. Facts of recognition;

A. A. The Plaintiff is a D operator, who provides credit card approval, etc. services (a broadband-Ded Network): A value-added network provider (a person registered with the Financial Services Commission in accordance with Article 2 subparag. 8-3 of the Specialized Credit Financial Business Act for value-added network, such as credit card companies, refers to a person registered with the Financial Services Commission in accordance with the Specialized Credit Financial Business Act for value-added network, and a credit card company and a credit card company, which are the representative director of C (hereinafter referred to as “C”) who is a franchisor managing the E franchise in Busan metropolitan area.

B. On September 25, 2015, the Plaintiff and C entered into a credit card approval system linkage contract (hereinafter “instant contract”) with all member stores E in Busan metropolitan area, which use the Plaintiff’s Banb services and machines such as terminals (hereinafter “instant contract”). The main contents are as follows, and the Defendant guaranteed C’s obligation to the Plaintiff.

[Plaintiff-Appellant] Article 3 (Scope and Roles of Provision of Services)

1. The scope and role of Gap and Eul services provided for in this Agreement shall be as follows:

(1) The kinds and details of services to be provided by Eul shall be as follows:

Credit Card Approval and Production Services

(b) educational support services for settlement machines;

(c) Automatic transfer of credit sales proceeds;

(d) automatic transfer of credit sales proceeds through electronic slips;

(e) additional services mutually agreed with A;

2.A shall play the following roles in order to facilitate the provision of services:

(1) A shall combine service Ban on the place of business determined by A with B.

(2) Eul shall maintain a continuous mutual cooperation system according to the support of additional services.

Article 5 (Responsibility)

1.2. (Dismissal Omitted)

3. If Party A changes his/her access to a service without consultation with Party B, Party A shall be liable for the damage of Party B.

Paragraph 11 (Termination of Contracts)

1. A.