A. The plaintiffs as the parties are occupants of the "L" canal wells (hereinafter referred to as the "multi-family housing of this case"), Defendant E (hereinafter referred to as the "Defendant E") is a project proprietor who constructed and sells the instant multi-family housing, Defendant G Co., Ltd. (hereinafter referred to as the "Defendant G") is a contractor who constructed and sells the instant multi-family housing, upon being awarded a contract for a new construction of the instant multi-family housing from Defendant E, and Defendant I (hereinafter referred to as the "Defendant I") is a company established in installments from Defendant G on July 5, 2006.

B. The instant apartment house was approved on September 14, 2007 for the purpose of claiming defective occurrence and repair of the instant apartment house.

Plaintiff

A with respect to Mdong N on June 3, 2010, Plaintiff B transferred ownership on May 30, 201, Plaintiff C occupied the apartment house in this case on December 29, 2011, Plaintiff D entered into a sales contract with Defendant E with respect to Qdong subparagraph on November 1, 2011, and Plaintiff D entered into a sales contract with Defendant E with respect to Qdong subparagraph on August 1, 201, Plaintiff A on August 17, 201, Plaintiff B, Plaintiff B on October 12, 2012, Plaintiff C, and Plaintiff D moved into the apartment house in this case on December 30, 201, and around that time, Plaintiff C did not change the construction drawings in accordance with the construction drawings and entered into the apartment house in this case and did not cause any defect in the construction drawings or construction drawings, or caused any defect in the part of the apartment house in this case’s section for exclusive use or construction.

[Ground of recognition] A without dispute, Gap evidence Nos. 1 through 3 (including branch numbers if there are additional numbers; hereinafter the same shall apply), Eul evidence Nos. 1, 2, and 6, the appraisal result by the appraiser S (hereinafter "appraisal"), the purport of the whole pleadings

2. Summary of the parties' arguments

A. The summary of the plaintiffs' assertion 1) Defendant E is the basis for the responsibility of Defendant E.