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 of the court's explanation of this case is the same as that of the judgment of the court of first instance, and thus, the relevant part is cited in accordance with the main sentence of Article 420 of the Civil Procedure Act.

2. In conclusion, the plaintiffs' claims of this case are accepted within the scope of the above recognition, and the remaining claims are dismissed, and the defendant's counterclaim of this case is dismissed as there is no reason to do so.

The judgment of the court of first instance is just in conclusion with the conclusion, and all appeals filed by the defendant against the principal lawsuit and counterclaim of this case are dismissed as it is without merit. It is so decided as per Disposition.