On the September 27th episode of 'Showbiz Korea', Luna expressed, "When f(x) started doing well, I suffered from vocal cord nodules. I was told that I shouldn't sing when I was 19. However, I was then cast in the 'Legally Blonde' musical, and I overcame my vocal cord nodules."
She also spoke on the criticism she received for her automatic acceptance into Chungang University's drama and cinema department. Luna shared, "I prepared for my college entrance and attended well. College life was so hard. It was hard to promote and attend school at the same time, and it was also because I received a lot of criticism because of it. Because they criticized me, I fell into a depression. I was so stressed out, thinking, 'Why are they criticizing me?' and 'I worked hard,' and I lost 10kg (22 lbs) because I couldn't eat."
Luna is currently starring in the musical 'Rebecca'.