1. All appeals against the instant principal lawsuit and counterclaim by the Defendant (Counterclaim Plaintiff) and the counterclaim extended at the trial.

1. The reasoning of the court's explanation of this case is the same as that of the part concerning the reasoning of the judgment of the court of first instance, and thus, it can be cited by the main sentence of Article 420 of the Civil Procedure Act.

2. The conclusion is that the plaintiff's principal lawsuit and the defendant's counterclaim are justified within the scope of each recognition, and the remainder of the plaintiff's principal lawsuit and the defendant's counterclaim are dismissed as they are without merit. The judgment of the court of first instance is just in conclusion. Thus, the defendant's appeal against the principal lawsuit and the counterclaim and the counterclaim expanded in the trial of the court of first instance are dismissed as they are without merit. It is so decided as per Disposition.