1. The Defendant shall pay to the Plaintiff KRW 27.9 million and the interest rate of KRW 15% per annum from April 29, 2016 to the date of complete payment.

In addition to the whole purport of the arguments, the plaintiff was a corporation established for the purpose of ready-mixed manufacturing business, etc., the plaintiff supplied ready-mixed at the business site B located in Gupopos, and the plaintiff was written by the defendant's actual operator C to pay the price of the above ready-mixed by April 15, 2016. At the time, the defendant's representative D's representative director D affixed the defendant's official seal on the above payment note and signed the representative director's name on the guarantor column, respectively.

According to the above facts of recognition, as joint and several sureties (see Article 57 (2) of the Commercial Act), the Defendant is obligated to pay the Plaintiff damages for delay calculated at the rate of 15% per annum from April 29, 2016 to the day of full payment (the day following the delivery date of the original copy of the payment order in this case), as the Plaintiff seeks.

Thus, the plaintiff's claim of this case is accepted on the ground of the reasons.