1. The Defendant is jointly and severally with Nonparty B to KRW 21,252,541 as well as to the Plaintiff from July 5, 2013 to September 1, 2016.

1. Basic facts

A. The Plaintiff is each landowner of Dong-gu Seoul Metropolitan City and D, and the Defendant is a corporation that runs the construction design and supervision business.

B. On March 2, 2012, the Plaintiff entered into a contract with Nonparty B to jointly implement a new project on the land located in the Dong-gu, Dong-dong and the land located in the city located in the ASEAN-si and the ASEAN-si. The Plaintiff provided the said land as a housing site, and the Plaintiff entered into a contract with Nonparty B to settle the remainder of the sales price with earnings after preferentially paying construction expenses and other expenses from the sales price after performing construction permission, construction cost burden, sales price management, housing management, etc.

(A) At the same time, the Plaintiff and the Defendant received a notary public on March 21, 2012 under the said joint agreement.

C. Around April 28, 2012, the owner of the building is the Plaintiff and B, and the person performing the construction supervision as the Defendant: (a) written contract (Evidence 2-1); and (b) written contract (Evidence 2-2-2) stating that “A contract for the design service and supervision of the construction work of the construction work of the construction work of the building of the building of the building of the building of the building of the building of the building of the building of the 73,080,000 won (excluding value-added tax) between the Plaintiff and B, for the Defendant, is prepared, respectively; and (b) written contract (Evidence 2-2) stating the name of the Defendant and affixed a seal of the Defendant.

(in total, two contracts are referred to as "each of the design and supervision contracts of this case". D.

On May 2012, 2012, the Defendant performed the design service work by completing the design drawings of the Donam-gu, Dong-gu, Dong-gu, D ground house construction work, and the design drawings of the F multi-household house construction work in ASEAN-si.

[Ground of recognition] There is no dispute, A1-2.