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

1. The grounds for appeal by the plaintiff and defendant in the judgment of the court of first instance are not significantly different from the allegations in the court of first instance, and the fact-finding and decision of the court of first instance are justified even if the testimony of witness B in the court of first instance was not presented.

Therefore, the reasoning of the judgment of this court is identical to the reasoning of the judgment of the court of first instance.

2. In conclusion, the plaintiff's claim in the principal lawsuit shall be accepted within the scope of the above recognition, and the remaining claims in the principal lawsuit shall be dismissed for lack of reasonable grounds. The defendant's counterclaim claim shall be dismissed for lack of reasonable grounds.

The judgment of the court of first instance is just in conclusion, and all appeals against the plaintiff's principal lawsuit and the defendant's principal lawsuit and counterclaim are dismissed as it is without merit.