손해배상(기)
1. The defendant (Counterclaim plaintiff)'s appeal is dismissed.
2. The appeal cost is borne by the Defendant (Counterclaim Plaintiff).
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 as it is.
2. In conclusion, the plaintiff's principal lawsuit and the defendants' counterclaim are accepted within the scope of each of the above grounds. The plaintiff's remaining principal lawsuit and the defendants' remaining counterclaim are dismissed as they are without merit. The judgment of the court of first instance is justified as it is so concluded, and the defendants' appeal is dismissed as it is without merit. It is so decided as per Disposition.