1. All of the plaintiffs' claims are dismissed.

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

1. Basic facts

A. On July 4, 2014, the deceased H (which is the husband of the Plaintiff A and the father of the other Plaintiffs; hereinafter “the deceased”) concluded an I insurance contract with the Defendant running the insurance business with the content that, on July 4, 2014, the deceased, the deceased’s legal heir of the beneficiary of death insurance, the insured period from July 4, 2014 to July 4, 2055, the insured would pay KRW 100 million to the beneficiary of the death insurance (hereinafter “the instant insurance contract”).

B. The main contents of the instant insurance contract are as follows.

Article 14 (Obligation to Notify before the Contract) The contractor or the insured shall be informed of the fact that he is aware of the fact that he is asked at the time of subscription (in the case of a diagnosis contract, the time of health examination).

However, in the case of a diagnosis contract, it may be substituted by a medical examination as data to determine the health conditions, such as a copy of the medical examination conducted by a workplace or an individual at a general hospital and a hospital pursuant to Article 3 (Medical Institution) of the Medical Service

Article 15 (Duty to Notify after Contract) (1) The contractor or the insured shall, when the insured changes his occupation or duty (including the case where the self-employed driver changes his occupation or duty as a driver), or continuously uses a two-wheeled motor vehicle or a motorcycle, notify the company without delay.

Article 16 (Effect of Violation of Obligation to Notify) (1) The Company may terminate this contract regardless of the occurrence of damages, in the following cases:

1. Where the contractor or the insured violates Article 14 by intention or gross negligence and the duty falls under important matters;

2. It is related to a significant increase in risk;