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

2. The costs of appeal shall be principal lawsuit and counterclaim.

1. The defendant's ground of appeal citing the judgment of the court of first instance is not significantly different from the argument in the court of first instance, and the fact-finding and judgment of the court of first instance are justifiable even if the defendant asserts and presents additional evidence.

Therefore, the court's explanation on the instant case is identical to the reasoning of the judgment of the court of first instance, and thus, it cites it pursuant to the main sentence of Article 420 of the Civil Procedure Act

(However, 2. Conclusion, the plaintiff's claim in the principal lawsuit against the co-defendant B, which was separated and confirmed, should be accepted within the extent of the above recognition, and the remaining claim in the principal lawsuit and the defendant's counterclaim claim should be dismissed as it is without merit.

The judgment of the first instance is just based on the conclusion, and all appeals filed by the defendant against the principal lawsuit and counterclaim are dismissed.