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

2. The costs of appeal shall be the principal lawsuit.

1. The reasoning for the court's explanation of this case is as follows: (a) evidence submitted at the court of first instance, which lacks to reverse the fact-finding of the court of first instance; (b) evidence Nos. 6, 7-1 through 4, 8-1, 2, 3, 9-1 through 4, and 10; and (c) evidence Nos. 420 of the Civil Procedure Act, are the same as the part of the reasoning of the court of first instance, and thus, (c) it is acceptable in accordance with the main sentence of Article 420 of the Civil Procedure Act.

2. In conclusion, the plaintiff's claim of the principal lawsuit is accepted within the scope of the above recognition, and the remainder of the principal lawsuit is dismissed as it is without merit, and the defendant's counterclaim is dismissed as it is without merit. The judgment of the court of first instance is just in conclusion, and the defendant's appeal against the principal lawsuit and the counterclaim is dismissed as it is without merit. It is so decided as per Disposition.