A. On December 26, 2001, the Minister of Construction and Transportation designated the project implementer as a planned area for housing site development in Sungnam-si, Sungnam-si, Korea Land Corporation, Korea National Housing Corporation (the Korea Land and Housing Corporation and the Korea National Housing Corporation are merged on October 1, 2009 and became the Korea Land and Housing Corporation after being merged on October 1, 2009) and Gyeonggi-do, and publicly notified the development plan approval on December 2, 2003.

(hereinafter referred to as "housing site development project of this case").

The Defendants decided to specially supply apartment houses to be constructed within the project district to be developed by the implementation of the instant housing site development project (hereinafter referred to as the “multi-unit housing of this case”) as part of the relocation measures against those who have lost their means of living due to the expropriation of their own housing or land as a result of the incorporation into the housing site development project district of this case.

C. Accordingly, around May 2006, Plaintiffs A, B, C, and D entered into each contract for sale in lots (hereinafter “each contract in lots”) with the content that Plaintiff E and F will purchase each of the amounts listed in the Schedule for Calculation of unjust enrichment in the attached Form 5, and succeeded to the rights and duties of each contract in lots from the above seller for sale in lots (hereinafter “each contract in lots”). < Amended by Presidential Decree No. 17870, May 2006; Presidential Decree No. 17870, Feb. 1, 2006; Presidential Decree No. 17870, Feb. 23, 2006; Presidential Decree No. 17458, Feb. 23, 2005>

(The plaintiff J's residence belongs to the project implementation district in charge of defendant Sungnam-si, and the rest of the plaintiffs' residence belongs to the project implementation district in charge of defendant Sungnam-si.

3.