'Real Men's female soldiers special aired on February 21,showing celebrities such as Cao Lu, Hyosung, Nana, Dahyun, Lee Chae Young, Kim Sung Eun, Gong Hyun Joo, Kim Young Hee, and more getting adjusted to their new military lifestyles. 

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On this particular episode, the members were all getting ready for enlistment. Nana was especially worried as she was slower to act than other people. So the singer challenged herself to try to shower in under ten minutes; alas, Nana couldn't wash herself fast enough no matter how much she put her mind to it. 

It was also during this scene that Nana's bare face was revealed, and you can clearly see that her natural beauty still shines without all the makeup!