1. All appeals filed by the Plaintiff (Counterclaim Defendant) and the Defendant (Counterclaim Plaintiff) are dismissed.

2. The costs of appeal shall be borne respectively by each party.

1. The grounds for appeal by the plaintiff and the defendant do not differ significantly from the allegations in the first instance court. Further, the fact-finding and decision by the first instance court are recognized as legitimate even if the additional evidence submitted in the first instance court in addition to the evidence presented in the first instance court. Unlike the defendant's assertion, the first instance court does not recognize the plaintiff's right to cancel the contract in accordance with the contract of this case, as stated in the fifth-six pages of the first instance court's decision, since there are serious defects that make it difficult for the plaintiff to achieve the purpose of the contract in accordance with the contract of this case as stated in the fifth-six pages of the first instance court's decision, it seems that the plaintiff recognized the right to cancel the contract of this case pursuant to Article 68 of the Civil Code. Thus, the plaintiff's appeal by the defendant under the premise that the contract of this case remains in existence as a delivery of a duplicate copy of the complaint of this case is not reasonable. Meanwhile, the plaintiff's decision of this case's 28,54500 won is not sufficient to acknowledge the plaintiff's duty to cancel the contract of this case's 15131.