The Defendants are jointly and severally liable to the Plaintiffs for 515,296,000 won and 6% per annum from May 25, 2016 to December 18, 2020.

1. Facts of recognition;

A. Status of the parties 1) Plaintiff A Co., Ltd. (hereinafter “Plaintiff A”).

2) The Plaintiff Company B (hereinafter “Plaintiff B”) is a company established for the purpose of cattle, facility design, supervision, and development consulting business.

(2) After the establishment of the committee for promotion of a regional housing association, Defendant C’s regional housing association (hereinafter “Defendant C”) changed the name to “F regional housing association promotion committee” at the time of authorization for the establishment of the committee, but changed the name to “F regional housing association” on February 2017.

3) Defendant D Co., Ltd. (hereinafter “Defendant D”)

A) The construction work for apartment buildings promoted by the Defendant Cooperative (hereinafter referred to as “instant construction work”) is established for the purpose of apartment management business, etc.

B) On April 7, 2015, the Plaintiffs entered into a design service contract with E Regional Housing Association and Defendant D, a telegraph of the Defendant Union, with respect to the instant construction work, with a contract amounting to KRW 1,512,00,000 (additional tax separately), and the main contents of the said design service contract are as follows.

E Regional Housing Association Promotion Committee (hereinafter referred to as “A”) and Plaintiff A (hereinafter referred to as “B1”) and Plaintiff B (hereinafter referred to as “B2,” and “B” collectively referred to as “B1” and “B2,” respectively, enter into an architectural design contract with Defendant D (hereinafter referred to as “A”) who entered into an implementation agency contract with Party A.

Byung shall be responsible for the joint and several sureties for the project.

Article 1 (General Provisions) This Agreement shall provide for the rights, obligations, etc. between the building owners (hereinafter referred to as "A") and the certified architect who has reported on his/her business pursuant to Article 23(1) of the Certified Architects Act (hereinafter referred to as "B") pursuant to Article 15 of the Building Act.