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

A. On August 16, 2012, the Plaintiff established a joint collateral security (hereinafter “instant collateral security”) on the land specified in paragraph (1) of the attached Table No. 1 owned by the Plaintiff and the buildings indicated in paragraph (2) of the attached Table No. 2 of the attached Table No. 1 owned by the Plaintiff on August 16, 2012, with a view to appropriating the new construction cost of the building under the ground No. 2 located in Ansan-gu, Ansan-si. Around that time, the Plaintiff borrowed KRW 50 million from the Defendant.

B. On July 5, 2013, the Plaintiff’s mother: (a) provided the Defendant with the land in Mayang-gu, Manyang-si; and (b) borrowed KRW 120 million from the Defendant as collateral; and (c) agreed with the Defendant to repay KRW 50 million out of the above loan to the secured debt of the instant mortgage; (b) the secured debt of the said right to collateral was extinguished due to repayment on July 5, 2013.

C. Therefore, the Defendant is obligated to implement the procedure for registration of cancellation of the registration of the establishment of the establishment of the instant neighboring mortgage and to return KRW 5,142,270, which was paid by the Plaintiff as interest from July 5, 2013 to February 16, 2015, to the Plaintiff as unjust enrichment.

2. On July 5, 2013, the Plaintiff’s claim for cancellation of the registration of creation of a mortgage and the claim for return of unjust enrichment on the premise that the secured debt of the instant mortgage was extinguished due to repayment on July 5, 2013, on the ground that the Defendant and the Defendant agreed to repay KRW 50 million among them as a substitute loan for the secured debt of the instant right to collateral security, and there is no evidence to acknowledge it. Therefore, the Plaintiff’s claim for cancellation of the registration of creation of a mortgage and the claim for return of unjust enrichment on the premise that the secured debt of the instant mortgage was extinguished due to repayment on July 5, 2013 are without merit.

3. The plaintiff's claim is dismissed as it is without merit. It is so decided as per Disposition.