A. On March 22, 2007, the Plaintiff leased the lease deposit amount of KRW 3 million, monthly rent of KRW 350,000,000, and the lease term of KRW 3 million from April 16, 2007, to the Defendant on the real estate listed in the attached list (hereinafter “instant building”).

B. The Defendant used the leased building of this case as an office, and the said lease contract was renewed several times, and the lease contract was terminated on April 16, 2015.

C. On October 18, 2014, at around 03:06, when the lease agreement is in force, the following is placed around the code for the smooth operation of a ventilation hole installed on the wall of the instant building at the inner side of the building.

As seen in the foregoing paragraph, a fire caused by electrical heat (hereinafter “instant fire”) was destroyed by the instant fire, and the instant building was destroyed by a fire, and the fire was destroyed by a fire, such as a household, etc. owned by each occupant of the first and second floor buildings other than the instant building.

The National Institute of Scientific Investigation revealed the results of investigating the fire of this case as follows.

- The burning shape of the office is an extension of burning centered on the left-hand part of the office, which is distinguishable from melting by electrical heat that can be operated by the cause of combustion in the part of the two containers installed on the wall of this part. On the face of the office, the left-hand part of the office can be limited to the first emission point. - The shapes of the office may be formed in the process of melting electrical melting in the part of the two containers and by dust, etc., and it can be seen as electrical characteristics that are difficult to be formed by external combustion in the process of combustion expansion, and that are generated by electrical heat and flames accompanying the process of combustion destruction by two containers.

The results of inquiry by the National Scientific Investigative Institute are as follows:

- - Smoke destruction means destruction of smoke at the time of the flow of large-electric currents due to the reduction of electric resistances between the substances with an explosiveed electric power.