1. The plaintiff A, B, C, D, E, F, H, H, K, K, M, M, N,O, P, Q, Q, Q, U, V, X, Y, Z, AB, AB, AC, AE, AF, and AG respectively.

1. Basic facts

A. The ownership relationship of the instant site was owned by the AJ, which is the Defendant’s set up by the Dongjak-gu Seoul Metropolitan Government AI 3,382 square meters (hereinafter “instant site”). On March 18, 1995, the Defendant inherited and completed the registration of ownership transfer, and thereafter, partially transferred ownership to AK Co., Ltd, AL, AM, etc.

B. AJ newly constructed a main complex building of the fifth floor size on the instant site and adjoining land. On October 1, 1973, AJ sold a building during construction to AK Co., Ltd. (the representative director at the time of the construction) on October 1, 1973. (2) AK Co., Ltd. completed the construction of the said building and obtained approval for use on January 7, 1976, and sold each apartment building of the third to fifth floor (hereinafter “the apartment of this case”) for each apartment building of the fifth floor (hereinafter “the apartment of this case”). Since then, some of the apartment of this case were transferred or inherited.

3) On July 10, 2009, India transferred 1/2 shares of the ownership of the instant apartment No. AB to the Plaintiff L and AP for sale. On April 25, 2018, AP transferred the said shares to the Plaintiff L for sale and purchase. On March 11, 2015, AP transferred the ownership of the instant apartment No. AS to the Plaintiff AF for sale and purchase, and BR transferred the ownership of the instant apartment No. AF to the Plaintiff on March 18, 2016. On May 23, 2016, AR transferred the ownership of the instant apartment No. 1/5 shares of the instant apartment No. B, AB, AB, and B, AF, B, and B, AF, and B, and B, AF, and B, and B, and B, and B, and B, and B, P, P, 1,201 for sale and purchase of the instant apartment No. 1/5 shares, B, and C, 1,5.