Kang Do-ha

Hyeon Dae and Min Joo thought one of them getting married would end the sex-partner relationship. However, they can't hold in their desires and Hyeon Dae destroys himself with sex, while Min Joo can't give up what she can't have. At the same time, they have a complicated and ugly relationship with past characters.

After two years of casual sex, a pair of emotionally repressed lovers abruptly part ways. But as they start new lives, memories of the past remain.

Sergeant Jeong Cheol-min's squad are in a renovated stock room with no window. The squad members are well known to be a hardworking group until Councellor Hong Yeong-soo comes in and starts causing trouble. Hong Yeong-soo seems to have difficulties adjusting to this environment. Things in the army changes rapidly, Jeong Cheol-min and his crew find themselves under attack perceived as the aggressors.