1. The Defendant Seoul Guarantee Insurance Co., Ltd.:

A. The plaintiff Howon Construction Co., Ltd. and Taedon C&C Co., Ltd. on 375.

1. Basic facts

A. The Plaintiff Sejong Construction Co., Ltd. (hereinafter “Plaintiff Sejong Construction”) (hereinafter “Plaintiff Sejong Construction”) concluded a subcontract for reinforced concrete construction among the construction sections of apartment construction works, including the conclusion of a contract for performance guarantee and the conclusion of a contract for advance payment guarantee, etc.

2) The Plaintiff 1 and the Plaintiff 1 are the Plaintiff 1 and the Plaintiff 1 were the Plaintiff 1 and the Plaintiff 1 were the Plaintiff 1.

(2) On February 10, 2012, the Republic of Korea Land and Housing Corporation awarded a subcontract for reinforced concrete construction among the apartment construction sections (hereinafter “Grain Construction”) between the Plaintiff Sejong Construction Co., Ltd. and Taeyang Construction Co., Ltd. (hereinafter “Grain Construction”), and the main contents thereof are as follows.

1. The original contract name of the Korea Land and Housing Corporation: One construction site for apartment buildings with smuggling;

2. Title of subcontracted construction: reinforced concrete construction work among sections for apartment construction work in smuggling.

4. Construction period: Contract amount of KRW 4,870,000 (hereafter referred to as "share ratio": KRW 80,000,000 for 4,870,000 for the first construction on February 10, 2012, and June 30, 2013: Contract amount of KRW 2,50,000 for the second construction section: KRW 2,370,000 for the second construction section:

8. Contract performance guarantee: Contract amount of 375,00,000 won for 2nd 15% which is 2,500,000,000 won: 237,000,000 won for 2,370,000 won for 2,370,000 won for 230,000 won for 10% for melting construction: Provided, That in the event of a cause for cancellation or cancellation of a contract for melting, it shall be the penalty for negligence, regardless of the actual loss, for YWC, regardless of the rate of construction in violation of the contract, and the contract performance guarantee shall be paid in full to the Plaintiff Sejong Construction and Thai C&C for Purpose Construction;

3) The main terms and conditions of the subcontract (main sentence) and special checks of reinforced concrete construction among the main sections of apartment construction works, and the main contents of the special terms and conditions are as follows (Evidence A 21-1 to 5).