2. The costs of lawsuit are assessed against the plaintiffs.

A. On August 18, 2015, the Plaintiffs entered into a sales contract with the Defendant on the purchase price of KRW 1,290,000 (10,000,000 for intermediate payment, KRW 545,00,00 for an intermediate payment, KRW 545,00,00 for the remainder payment, KRW 645,00,000 for the remainder payment to the Plaintiffs by succeeding to the remainder payment by the Plaintiffs, and KRW 645,000,00,000 for the lease deposit repayment obligations against the lessees of the building, and KRW 86.8,000 for multi-family houses with the fourth floor (per 1st floor on the building ledger, KRW 86.8 square meters on the second floor, KRW 36.8 square meters on the third floor, KRW 53.32 square meters on the fourth floor, and KRW 100,000 for each of the instant buildings).

B. On October 7, 2014, the general building ledger was prepared. On the fourth floor of the instant building, any extension not included in the area entered in the public register was registered in the aggregate building ledger as “violation building” around October 22, 2015, and on the column of the change in the above ledger, each entry is written as “the date of change: on October 22, 2015; on October 22, 2015; on the ground that “the date of change: the date of change; on the ground that the change was made; on the ground that the change was made: the date of change; on the building tag (4th floor, the board/board; the place of residence; the extension without permission of 24 square meters)”; and on the date of change: on February 29, 2016; on the ground that the change was made: on the ground that the report was amended (33 square meters without permission

[Reasons for Recognition] Facts without dispute, Gap evidence Nos. 1, 2, 9, 10, 12 (including the serial number), the purport of the whole pleadings

2. The parties' assertion and judgment

A. The plaintiffs' assertion 1) cancel or cancel the sales contract of this case for the following reasons. Thus, the defendant is obligated to pay the plaintiffs a down payment of KRW 100,000,000 and delay damages.

① At the time of the conclusion of the instant sales contract, the Defendant did not notify the Plaintiffs of the fact of the extension without permission, and the fact that there was an unauthorized extension has been determined as to whether the sales contract was concluded.