1. All appeals filed by the Defendant (Counterclaim Plaintiff) against the principal lawsuit and counterclaim are dismissed.

2. The costs of appeal shall be principal lawsuit and counterclaim.

1. The reasoning of the court's explanation concerning this case is as follows: (a) adding "Evidence No. 10-1, 2, and 11 of Evidence No. 10-2" to "Evidence No. 5-1, 2, and 16 of Evidence No. 5-2 of the first instance judgment; and (b) adding "Evidence No. 9-1, 3" to "Evidence No. 6-1, 5 of Evidence No. 6-2 of the first instance judgment; and (c) as stated in the reasoning of the first instance judgment, the first instance judgment is cited pursuant to the main sentence of Article 420 of the Civil Procedure Act.

2. According to the conclusion, the plaintiff's main claim is accepted within the scope of the above recognition, and the remaining main claim and the defendant's counterclaim are dismissed as they are without merit.

The judgment of the first instance court is just in conclusion, and the defendant's appeal is dismissed as it is groundless.