1. The plaintiff's claim is dismissed.

2. The costs of the lawsuit, including the part resulting from the supplementary participation, are all assessed against the Plaintiff.

1. Basic facts

A. 1) The intervenor was established on June 30, 2016 with the investment of C&D and six development subsidiaries (D Co., Ltd., E&F Co., Ltd., G Co., Ltd., H Co., Ltd., H Co., Ltd., and I Co., Ltd.) which are public enterprises. The intervenor is a special purpose corporation for the purpose of the rationalization of the energy utilization and the reduction of greenhouse gas emissions. According to the purpose of the establishment, the intervenor was ordinarily employed by approximately twenty workers and engaged in the energy efficiency facility investment business. 2) The plaintiff was employed by J Co., Ltd. as a person who had worked in the field related to the energy business for about 20 years, including working as the head of the business development team at J Co., Ltd., for three months, and the position was the deputy head of the business promotion team (Grade 3).

B. 1) The Intervenor’s business contents, etc. (i) the Intervenor’s main business of the energy efficiency facility investment project refers to a boiler that uses KBN as part of the energy efficiency facility investment project from November 201, 2016, where the Intervenor invested in the cost of installing energy efficiency facilities, such as high-efficiency equipment, high-efficiency lad lighting, etc., and the energy saving amount arising therefrom is received from the energy user. Moreover, the Plaintiff may expect the effect of improving energy efficiency and reducing greenhouse gas emissions through such energy efficiency facility investment project. (ii) As part of the energy efficiency facility investment project, the Plaintiff refers to a boiler that uses K BB N (hereinafter “K”).

The work was conducted to invest installation costs.

(1) As part of the energy efficiency project, the instant boiler installation project promoted by the Plaintiff (hereinafter “instant boiler installation project”). According to the instant boiler installation project plan prepared by the Plaintiff, M Co., Ltd. (hereinafter “M”) set up in K a L boiler (hereinafter “instant boiler”), the Intervenor, 2.