2. The Defendant: (a) KRW 42,00,000 for the Plaintiff and its related expenses from February 10, 2015 to November 2018.

A. On July 24, 2014, the Plaintiff entered into a construction contract (hereinafter “instant construction contract”) with the Defendant for a construction period of KRW 176,00,000 of the construction amount (including value-added tax) from August 5, 2014 to August 31, 2014 with respect to the composite partitions and ventilation partitions among the construction works for C head office buildings (hereinafter “instant construction works”). The main contents are as follows.

Article 2 (Contractor) (1) The Plaintiff shall execute construction works in accordance with the terms and conditions of this contract and design documents (the changed drawings and change specifications).

(2) The plaintiff shall prepare a drawing and unit price on the basis of the drawing and drawing and submit it to the defendant without delay after concluding the contract for approval.

(3) Unless specified in the design documents, the Plaintiff shall, within the scope of the contract amount, perform minor construction works necessary for the minor change or structural structure of the relevant construction works, and the cost-generating portion shall be separately consulted.

Article 4 (Inspection of Construction Materials) (1) The use of existing materials for the Corporation shall take precedence over the use of existing materials, and if short, a new order shall be given.

In addition, the Corporation shall settle the accounts additionally other than the contract details.

(2) Materials to be used for construction shall be inspected by all supervisors before their use, and the disqualified materials shall be inspected immediately in substitution for substitute parts.

However, the contract term can not be extended for this reason.

Article 5 (Change or Suspension of Construction Works) (1) The defendant may, if deemed necessary, request in writing the alteration of the details of construction works, addition or temporary suspension of construction works.

Accordingly, if it is necessary to extend or reduce the contract period or to increase or decrease the contract amount, it shall be decided in consultation with the plaintiff.

(2) An increase or decrease in the contract price under paragraph (1) shall be in accordance with the following standards:

The unit price for the increased or decreased volume of construction works shall be the unit price on the calculation sheet under the provisions of Article 2 (2) (hereinafter referred to as the "contractual unit price").

B. The plaintiff.