1. The plaintiff's primary claim is dismissed in entirety.

2. The costs of lawsuit shall be borne by the Plaintiff.

1. Facts recognized;

A. On April 25, 2017, G Co., Ltd., the contractor that was ordered by Jeong-gun, a contractor, awarded a subcontract to the Plaintiff for the part of the construction work, and the Defendants leased the construction machinery at the construction site pursuant to the construction machinery rental contract concluded with the Plaintiff around that time. Based on the agreement on direct payment of the rent for the construction machinery (standard form) made by the G Co., Ltd and the Plaintiff on September 2017, the Defendants paid KRW 36,01,90 on September 28, 2017, and KRW 28,987,300 to Defendant C, and KRW 29,777,300 to Defendant D respectively, there is no dispute between the parties, and there is no dispute between the parties.

나. 을 1-1~1-3의 각 기재와 증인 E, H의 각 일부 증언에 변론 전체의 취지를 더하면, 주식회사 G의 현장소장으로서 원고를 대리하여 위 공사현장을 관리하던 E과 피고들 사이에 위와 같이 정선군으로부터 건설기계 대여대금을 직접 받기 전에 ‘피고들의 정당한 각 채권액을 넘는 금액을 일단 피고들이 정선군으로부터 직접 받았다가, 곧바로 E에게 그 각 초과금액을 지급하기로 하는 약정’이 이루어졌고, 그 약정에 따라 피고들은 정선군으로부터 위 각 돈을 받은 당일 곧바로 E에게 1,657만원(☞ 피고 B), 2,470만원(☞ 피고 C), 29,777,300원(☞ 피고 D)을 각각 지급한 사실을 인정할 수 있다.

2. Judgment on the issue

A. (1) With respect to each of the primary claims filed by the Plaintiff, the Plaintiff asserts that the amount actually received from the Jeong-gun in excess of the construction machinery rental fees that the Defendants could reasonably claim against the Plaintiff constitutes an unfounded benefit in relation to the Plaintiff, and that the amount constitutes unjust enrichment against the Defendants.