1. The defendant,

A. From November 30, 2013 to Plaintiff A 21,231,040 won and its related thereto:

B. Plaintiff B 31,793,427.

1. Basic facts

A. The parties concerned 1) The defendant is a specialized university entrance training institute (hereinafter collectively referred to as the "private teaching institute of this case") in the name of "KAK" in Busan and Ulsan Island, including KAK located in the Dong-gu Busan Metropolitan City.

(1) Plaintiff A operated the instant private teaching institute as a Korean language instructor from January 4, 2007 to November 15, 2013; Plaintiff B as an instructor of the instant private teaching institute from February 13, 2006 to November 15, 2013; Plaintiff C as an instructor of the instant private teaching institute from February 13, 2006 to November 15, 2013; Plaintiff D as an instructor of the instant private teaching institute from June 22, 2004 to November 15, 2012; Plaintiff C as an instructor of the instant private teaching institute from February 12, 2009 to November 15, 2018; Plaintiff E as an English instructor from February 15, 2009 to November 15, 2013; and Plaintiff C as an English instructor from February 21, 2006 to November 21, 2014 to November 15, 2013.

B. The Plaintiffs, including the content, form, and remuneration of their duties, were from February 1 to November 1 of each year, from 08:40 to 6:20 p.m. during the nine major lecture hours, and were usually 50 to 100 p.m. during the nine major lecture hours. In the case of the two major lecture teams, the Plaintiffs did not make a lecture and did not receive tuition fees until February 1 of the following year after the completion of the education ability test.