1. The plaintiff's claim is dismissed.

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

1. Basic facts

A. On November 25, 2016, Plaintiff 1 entered into a sales contract with the Defendant, on February 15, 2016, with the term “SK Energy Co., Ltd.” (hereinafter “SK Energy”) for the remainder of KRW 11,500,00,000, total of the LPG storage tanks and ancillary equipment located in the SPG Terminal where bidding is conducted (hereinafter “instant subject matter”), 9,000,000, total of KRW 11,3,000,000,000, such as the storage tank, the shipment equipment, design drawings, and other related materials as well as the discharge equipment, and the remainder of KRW 9,00,000,000,000,000,000,000,000,000,0000,000,000,000,000,000,000,00,00.

B. On February 29, 2016, the Plaintiff paid to the Defendant KRW 30 million, KRW 50 million on March 7, 2016, KRW 25 million on March 10, 2016, KRW 270 million on March 15, 2016, and KRW 375 million on March 15, 2016. Furthermore, the Plaintiff is a total of KRW 375 million.

C. Meanwhile, on February 18, 2016, the Defendant received the notice of successful bid from SK Energy, and entered into a sales contract to purchase the subject matter of this case at KRW 8.25 million with SK Energy on March 15, 2016 (hereinafter “related sales contract”). The down payment amount of KRW 3750 million shall be substituted by the bid deposit, etc. already paid by the Defendant, and the remainder amount of KRW 7.125 billion and value-added tax of KRW 7.750 million shall be paid up to March 29, 2016, by the amount of KRW 7.87,60 million in total as value-added tax and KRW 7.5 billion in value-added tax and KRW 7.750 million in value-added tax and KRW 7.6 billion in value-added tax were to be paid until March 29, 2016. In special terms, the Defendant’s legal relationship with the instant subject matter