Luna happily recalls working to the point of a nosebleed back as a trainee

Luna fondly remembered her training days during her appearance on MBC's 'Radio Star' on May 27.

She revealed that her role model was BoA, saying, "I practiced to the point I bled from both nostrils to be like BoA."

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She went into further detail, elaborating, "When I was a 14 or 15-year-old trainee, I had to leave at 9 o'clock.  However, I'd pretend to leave and actually go up to the third floor practice room to practice until 4 or 5 in the morning.

"I was tired, so I didn't even know if I was sleeping.  However, my dad told me I was sleeping atop the shoe rack.  Also, he said he was shocked because I was bleeding from both nostrils, but I was happy about that.  It made me think I was also working hard."