A. The Plaintiffs are the members of the Defendant A Regional Housing Association (hereinafter “Defendant Association”) or their successors, and the Defendant Association is a regional housing association established for the purpose of constructing and supplying to its members a regional housing association apartment with a scale of 423 square meters (hereinafter “instant apartment”) on the scale of 25,451.70 square meters in the north-gu Seoul Metropolitan City, Chungcheongnam-gu, Seoul Metropolitan City, for the purpose of supplying it (hereinafter “instant apartment project”).

B. On July 2015, Defendant B Co., Ltd. (hereinafter “Defendant B”) entered into an agency contract (hereinafter “instant agency contract”) with the District Housing Association Promotion Committee prior to the authorization on the establishment of the Defendant Association by setting forth as its duties the comprehensive project plan for the project of the regional housing association, the initial fund raising and execution necessary for the promotion of the project, and all business affairs related to the project site contract (purchase of land), etc., and Defendant D is the representative of the inside director of the Defendant B.

C. On July 2015, Defendant C Co., Ltd (hereinafter “Defendant C”) entered into an agreement on housing construction contract with the said promotion committee and Defendant B, setting the scope of each of its duties (hereinafter “instant business agreement”) prior to entering into a contract on construction work (hereinafter “instant business agreement”). Defendant C is a director of Defendant C.

Defendant B entered into the instant agency contract with J on August 5, 2015, and the first advertising service contract with K and K on August 7, 2015, respectively. The said promotion committee, Defendant B, and Defendant C entered into a contract with L Co., Ltd on the fund management agency for the instant project on September 24, 2015.

After that, on April 15, 2016, the defendant union and the defendant B entered into the secondary sales agency service contract for the business of this case with the LAB and the KAB, and on April 2016, the second sales agency service contract with the LAB and the second sales agency contract for the business of this case respectively.

E. The Defendant Union applied for authorization to establish the association on January 21, 2016.