1. The Defendants are jointly and severally liable to the Plaintiff for KRW 84,00,000 and Defendant B with respect thereto from March 17, 2018, and Defendant C with respect thereto.

Since the Plaintiff lent KRW 100,000 to E, and the Defendants jointly and severally guaranteed their obligations do not conflict between the parties, the Defendants are jointly and severally liable to pay to the Plaintiff damages for delay calculated at a rate of 5% per annum as stipulated in the Civil Act from March 17, 2018 to December 21, 2017, and from December 22, 2017 to the date of full payment, the remainder of KRW 84,00,000, which remains after deducting KRW 16,000,000 paid to the Plaintiff from KRW 16,00,000,000, and the copy of the instant payment order was served on the Plaintiff.

Therefore, the plaintiff's claim against the defendants is justified.