A. A. Around February 6, 2002, the Defendant obtained approval of a business plan to build 17,703 square meters of Y and 17,703 square meters of public rental housing (hereinafter “the apartment of this case”) from the Simpo City pursuant to Article 33 of the former Housing Construction Promotion Act (amended by Act No. 6655 of Feb. 4, 2002) and Article 32 of the Enforcement Decree of the same Act (amended by Presidential Decree No. 17816 of Dec. 26, 2002), and announced the invitation of occupants on June 14, 2002 by combining the period of sale in lots (five years after the mandatory lease period) and the criteria for calculating pre-sale conversion price.

B. The Plaintiffs leased each apartment building listed in the separate sheet No. 1 (hereinafter “each apartment of this case”) with the Defendant as indicated in the separate sheet No. 2, and entered into a lease agreement with the following terms (hereinafter “instant lease agreement”). The subsequent change of the lease deposit several times, and the lease deposit amount was KRW 61,420,000, respectively without monthly rent agreement. The Plaintiffs paid all of them.

In leasing a house with indication under the standard lease agreement, a lessor (hereinafter referred to as "A") and a lessee (hereinafter referred to as "B") shall conclude a lease agreement with the following terms, prepare two copies of the contract in order to verify the lease agreement, and keep one copy of the contract signed and sealed by both A and B, respectively:

Article 5 (Change of Terms and Conditions of Lease, etc.) A and B may adjust the rental deposit, rent, management expenses or user fees and the amount of payment in installments in any of the following cases:

Provided, That the adjustment of lease deposits and rents shall not violate the provisions prescribed by the Rental Housing Act and the Housing Lease Protection Act.

1. When there are changes in prices or other economic conditions;

2. Where it is necessary to adjust terms and conditions of lease among housing leased by Party A, or between rental housing in a neighboring similar area;

3. Rental housing; and