1. The Defendant’s KRW 764,180,271 as well as the Plaintiff’s annual rate from September 1, 201 to November 23, 2012, and the following.

1. Basic facts

A. The pertinent Plaintiff is a corporation with the purpose of building design, etc., and the Defendant, a corporation operating a housing construction business, etc., promoted B apartment house (hereinafter “instant apartment”) on the ground level on the land outside A and 14 lots in Taesi-si.

B. (1) On September 2, 2003, the Plaintiff and the Defendant concluded the construction design service contract with respect to the construction of the instant apartment on September 2, 2003, setting the outline of the design and the payment period as follows.

After that, on September 9, 2003, revised the site area to 85,778 square meters (25,947.85 square meters) and drafted a design service alteration contract.

(hereinafter referred to as "original contract": A site area for the payment date of the service cost: 85,876 square meters (25,977 square meters): A multi-family housing (multi-family housing and ancillary welfare facilities): A second underground floor and the 20th floor area: A reinforced concrete: 10% at the time of concluding a contract, 204,652.36 square meters (61,907.34 square meters) and 10% at the time of receipt of the 20% construction completion certificate at the time of receipt of the 20% construction completion certificate at the time of receipt of the 20% construction completion certificate at the time of receipt of the 30% construction completion certificate at the time of receipt of the 20% construction completion certificate at the time of the first additional design service contract, and the contents and schedule of the project progress have been embodied on March 13, 2006, the Plaintiff and the Defendant concluded the additional design service contract at the time of project alteration (200,000 won).

(hereinafter referred to as “the first additional contract”). (3) On January 22, 2007, the Plaintiff and the Defendant entered into a contract for the second additional design service by setting up the design service for the adjustment of placement and the approval of modification of the business plan on the settlement of unit generations in the amount of KRW 150,00,000 (Additional Tax) (hereinafter “the second additional contract”). The service price was paid at 50% at the time of issuance of the certificate of approval of the commencement and the remaining 50% at the time of approval of the parcelling-out.

(d)a minor change;