1. The plaintiffs' development of Dongdaemun Housing Industry, IO reconstruction association, and Pung Forest Industry Co., Ltd.

1. Basic facts

A. The plaintiffs are parties 1) The trade name of the apartment of this case before the alteration of the K apartment constructed on the land of Busan Jin-gu and 2, Busan. (hereinafter "the apartment of this case"). (hereinafter "the apartment of this case").

Of the attached Table 2, it is the purchaser or buyer who purchased each apartment in the attached Table 2, the unit column of the apartment in the attached Table 2, and the purchaser, etc. who succeeded to the rights thereof. 2) The defendant Dongdong Housing Industry Development Co., Ltd. (hereinafter referred to as the "Dongdong Housing") and the defendant I.O. reconstruction association (hereinafter referred to as the "renovation association") are the co-implementers and buyers of the construction of the apartment in this case, etc., and the defendant Pung Forest Industry Co., Ltd. (hereinafter referred to as the "Pung Forest Industry") are the contractor of the new apartment in this case, and the defendant Korea Housing Guarantee Co., Ltd. (hereinafter referred to as the "Korea Housing Guarantee Co., Ltd.") is the guarantee company that entered into a sales guarantee agreement with the defendant Dongdong Housing Co., Ltd. on June 12, 2007 to refund the down payment and intermediate payment already paid to the purchaser or buyer of the apartment in this case pursuant to the relevant Acts and subordinate statutes and the written guarantee.

B. (1) The conclusion of the instant sales contract, etc.) Defendant Eastdong Housing, Reconstruction Association, and C&W Bank Co., Ltd. (Defendant Pung Forest Industry is the contractor before the alteration of the contract; hereinafter “C&W bank”).

(1) On June 2007, the Plaintiff, E, F, and H announced the invitation of occupants of the instant apartment, and Plaintiff D, E, F, and H, pursuant to the said public announcement of sale, the Defendant Dongdong Housing, the Reconstruction Association, and the C&C Housing (hereinafter “Defendant Dongdong Housing, etc.”).

(2) At the time, the above plaintiffs have concluded a sales contract with the financial institutions designated by Defendant Dongdong Housing, etc. to cover the second down payment and each of the intermediate payments after paying the amount equivalent to 5% of the sales price as the down payment on the date of each contract.