1. The appeal against the instant principal lawsuit and counterclaim by the Defendant (Counterclaim Plaintiff) and the instant principal lawsuit by the Plaintiff (Counterclaim Defendant).

1. The reasons for the reasoning of this case are as stated in the reasoning of the judgment of the court of first instance, except where the court stated “12,243,00 won per month” in the fourth sentence of the judgment of the court of first instance as “13,703,00 won per month”, and thus, it is identical to the reasoning of the judgment of the court of first instance pursuant to the main sentence of Article 420 of the Civil Procedure Act.

2. The judgment of the court of first instance is justifiable, and all appeals filed by the defendant against the main lawsuit and counterclaims of this case and incidental appeals filed by the plaintiff against the main lawsuit of this case are dismissed as it is without merit, and the plaintiff's claims expanded in the trial of this case are dismissed as it is without merit.